Build failing on jdk 11.0.2

[rohanKanojia]

When I try to compile project on jdk11, it seems to be breaking giving this error(shown below). Maybe we forgot to accommodate java 11 related changes while adding knative/tekton extensions?

INFO] --- build-helper-maven-plugin:3.0.0:parse-version (parse-version) @ kubernetes-extensions ---
[INFO] 
[INFO] --- jacoco-maven-plugin:0.8.4:prepare-agent (default-prepare-agent) @ kubernetes-extensions ---
[INFO] argLine set to -javaagent:/home/rohaan/.m2/repository/org/jacoco/org.jacoco.agent/0.8.4/org.jacoco.agent-0.8.4-runtime.jar=destfile=/home/rohaan/go/src/github.com/fabric8io/kubernetes-client/extensions/target/jacoco.exec
[INFO] 
[INFO] --- jandex-maven-plugin:1.0.6:jandex (make-index) @ kubernetes-extensions ---
[INFO] [SKIP] Cannot process fileset in directory: /home/rohaan/go/src/github.com/fabric8io/kubernetes-client/extensions/target/classes. Directory does not exist!
[INFO] 
[INFO] --- jacoco-maven-plugin:0.8.4:report (default-report) @ kubernetes-extensions ---
[INFO] Skipping JaCoCo execution due to missing execution data file.
[INFO] 
[INFO] --- maven-install-plugin:2.4:install (default-install) @ kubernetes-extensions ---
[INFO] Installing /home/rohaan/go/src/github.com/fabric8io/kubernetes-client/extensions/pom.xml to /home/rohaan/.m2/repository/io/fabric8/kubernetes-extensions/4.4-SNAPSHOT/kubernetes-extensions-4.4-SNAPSHOT.pom
[INFO] 
[INFO] ------------------< io.fabric8:knative-extension-pom >------------------
[INFO] Building Fabric8 :: Knative :: Extension 4.4-SNAPSHOT            [12/39]
[INFO] --------------------------------[ pom ]---------------------------------
[INFO] 
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ knative-extension-pom ---
[INFO] 
[INFO] --- maven-enforcer-plugin:1.2:enforce (enforce-maven) @ knative-extension-pom ---
[INFO] 
[INFO] --- sundr-maven-plugin:0.17.2:generate-bom (default) @ knative-extension-pom ---
[INFO] 
[INFO] --- build-helper-maven-plugin:3.0.0:parse-version (parse-version) @ knative-extension-pom ---
[INFO] 
[INFO] --- jacoco-maven-plugin:0.8.4:prepare-agent (default-prepare-agent) @ knative-extension-pom ---
[INFO] argLine set to -javaagent:/home/rohaan/.m2/repository/org/jacoco/org.jacoco.agent/0.8.4/org.jacoco.agent-0.8.4-runtime.jar=destfile=/home/rohaan/go/src/github.com/fabric8io/kubernetes-client/extensions/knative/target/jacoco.exec
[INFO] 
[INFO] --- jandex-maven-plugin:1.0.6:jandex (make-index) @ knative-extension-pom ---
[INFO] [SKIP] Cannot process fileset in directory: /home/rohaan/go/src/github.com/fabric8io/kubernetes-client/extensions/knative/target/classes. Directory does not exist!
[INFO] 
[INFO] --- jacoco-maven-plugin:0.8.4:report (default-report) @ knative-extension-pom ---
[INFO] Skipping JaCoCo execution due to missing execution data file.
[INFO] 
[INFO] --- maven-install-plugin:2.4:install (default-install) @ knative-extension-pom ---
[INFO] Installing /home/rohaan/go/src/github.com/fabric8io/kubernetes-client/extensions/knative/pom.xml to /home/rohaan/.m2/repository/io/fabric8/knative-extension-pom/4.4-SNAPSHOT/knative-extension-pom-4.4-SNAPSHOT.pom
[INFO] 
[INFO] -----------------< io.fabric8:knative-model-annotator >-----------------
[INFO] Building Fabric8 :: Knative :: Model :: Annotator 4.4-SNAPSHOT   [13/39]
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary for Fabric8 :: Kubernetes :: Project 4.4-SNAPSHOT:
[INFO] 
[INFO] Fabric8 :: Kubernetes :: Project ................... SUCCESS [ 51.388 s]
[INFO] Fabric8 :: Kubernetes Model Parent ................. SUCCESS [  0.586 s]
[INFO] Fabric8 :: Kubernetes Model :: Common .............. SUCCESS [  1.439 s]
[INFO] Fabric8 :: Kubernetes Model Annotator .............. SUCCESS [  1.114 s]
[INFO] Fabric8 :: Kubernetes Model ........................ SUCCESS [02:43 min]
[INFO] Fabric8 :: Kubernetes :: Java Client ............... SUCCESS [ 10.888 s]
[INFO] Fabric8 :: Kubernetes :: Server Mock ............... SUCCESS [  0.691 s]
[INFO] Fabric8 :: Openshift :: Java Client ................ SUCCESS [  4.042 s]
[INFO] Fabric8 :: Kubernetes :: Extensions ................ SUCCESS [  0.020 s]
[INFO] Fabric8 :: Knative :: Extension .................... SUCCESS [  0.014 s]
[INFO] Fabric8 :: Knative :: Model :: Annotator ........... FAILURE [  0.007 s]
[INFO] Fabric8 :: Knative :: Model ........................ SKIPPED
[INFO] Fabric8 :: Knative :: Client ....................... SKIPPED
[INFO] Fabric8 :: Knative :: Server Mock .................. SKIPPED
[INFO] Fabric8 :: Knative :: Examples ..................... SKIPPED
[INFO] Fabric8 :: Knative :: Tests ........................ SKIPPED
[INFO] Fabric8 :: Tekton :: Extension ..................... SKIPPED
[INFO] Fabric8 :: Tekton :: Model :: Annotator ............ SKIPPED
[INFO] Fabric8 :: Tekton :: Model ......................... SKIPPED
[INFO] Fabric8 :: Tekton :: Client ........................ SKIPPED
[INFO] Fabric8 :: Tekton :: Server Mock ................... SKIPPED
[INFO] Fabric8 :: Tekton :: Examples ...................... SKIPPED
[INFO] Fabric8 :: Tekton :: Tests ......................... SKIPPED
[INFO] Fabric8 :: Service Catalog :: Extension ............ SKIPPED
[INFO] Fabric8 :: Service Catalog Model Parent ............ SKIPPED
[INFO] Fabric8 :: Service Catalog :: Model :: Annotator ... SKIPPED
[INFO] Fabric8 :: Service Catalog :: Model ................ SKIPPED
[INFO] Fabric8 :: Service Catalog :: Client ............... SKIPPED
[INFO] Fabric8 :: Service Catalog :: Server Mock .......... SKIPPED
[INFO] Fabric8 :: Service Catalog :: Examples ............. SKIPPED
[INFO] Fabric8 :: Service Catalog :: Tests ................ SKIPPED
[INFO] Fabric8 :: Openshift :: Server Mock ................ SKIPPED
[INFO] Fabric8 :: Kubernetes :: Client Examples ........... SKIPPED
[INFO] Fabric8 :: Kubernetes :: Platforms ................. SKIPPED
[INFO] Fabric8 :: Kubernetes :: Platforms :: Karaf ........ SKIPPED
[INFO] Fabric8 :: Kubernetes :: Platforms :: Karaf :: Features SKIPPED
[INFO] Fabric8 :: Kubernetes :: Platforms :: Karaf :: Tests SKIPPED
[INFO] Fabric8 :: Kubernetes :: Tests ..................... SKIPPED
[INFO] Fabric8 :: Kubernetes and Openshift :: UberJar ..... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  03:55 min
[INFO] Finished at: 2019-08-29T13:07:08+05:30
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project knative-model-annotator: Could not resolve dependencies for project io.fabric8:knative-model-annotator:jar:4.4-SNAPSHOT: Could not find artifact com.sun:tools:jar:1.7 at specified path /usr/lib/jvm/java-8-jdk/jre/../lib/tools.jar -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/DependencyResolutionException
[ERROR] 
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn <goals> -rf :knative-model-annotator