Fix exemplar tests
Fix exemplar tests

The sample plugin had an issue with exemplar for generated content. This
commit upgrade to bug fixed sample plugin and add the additional
configuration for correctly dealing with generated content.

gradle/gradle,blindpirate/gradle,blindpirate/gradle,gradle/gradle,gradle/gradle,blindpirate/gradle,gradle/gradle,gradle/gradle,blindpirate/gradle,gradle/gradle,blindpirate/gradle,blindpirate/gradle,blindpirate/gradle,gradle/gradle,blindpirate/gradle,gradle/gradle,blindpirate/gradle,gradle/gradle,gradle/gradle,blindpirate/gradle