ci: discard invalid jar signatures; see https://issues.apache.org/jir…

…a/browse/ZOOKEEPER-2854

.travis.yml

@@ -12,8 +12,8 @@ branches:
     - master
 
 before_install:
-  - wget http://apache.cs.utah.edu/zookeeper/zookeeper-3.4.10/zookeeper-3.4.10.tar.gz
-  - tar -zxvf zookeeper*tar.gz
+  - wget http://apache.cs.utah.edu/zookeeper/zookeeper-${zk_version}/zookeeper-${zk_version}.tar.gz
+  - tar -zxvf zookeeper*tar.gz && zip -d zookeeper-${zk_version}/contrib/fatjar/zookeeper-${zk_version}-fatjar.jar 'META-INF/.SF' 'META-INF/*.DSA'
   - go get github.com/mattn/goveralls
   - go get golang.org/x/tools/cmd/cover
 
@@ -29,3 +29,5 @@ script:
 env:
   global:
     secure: Coha3DDcXmsekrHCZlKvRAc+pMBaQU1QS/3++3YCCUXVDBWgVsC1ZIc9df4RLdZ/ncGd86eoRq/S+zyn1XbnqK5+ePqwJoUnJ59BE8ZyHLWI9ajVn3fND1MTduu/ksGsS79+IYbdVI5wgjSgjD3Ktp6Y5uPl+BPosjYBGdNcHS4=
+  matrix:
+    - zk_version=3.4.10