Misleading log message when app.yaml and appengine-web.xml file are missing

[peterjot]

If app.yaml and appengine-web.xml file are missing then we get "Detected App Engine app.yaml based application." log message. I think we could log another message in such case, because this one is misleading.

https://github.com/GoogleCloudPlatform/app-maven-plugin/blob/master/src/main/java/com/google/cloud/tools/maven/deploy/Deployer.java#L44

[jasinapj]

Maybe we could throw an exception if the xml and yaml configuration were not found? Right now the yaml stager is used in that case

[loosebazooka]

Makes sense, and user contributions are always appreciated.

[cxorm]

Could I take this issue if you don't mind : )

[meltsufin]

Sure.

[cxorm]

Thanks @meltsufin , I'm working on it.

( Just out of curiosity, what's the meaning of label p4 )

PR has been filed, could you be so kind as to take a look on it ^_^

[elefeint]

p4 means you don't have a deadline to finish the task :)