JavadocFileEncodingIntegrationTest.groovy

Cleanup Java performance test projects and scenarios
- Sort tests into packages
- Add new test projects: `largeMonolithicJavaProject`,
`largeJavaMultiProject`, `mediumJavaMultiProjectWithTestNG`
- Cleanup template.gradle file
-- Remove "old Java" templates
-- Remove unused Scala and Groovy performance
test project configurations
-- Remove large enterprise performance test projects
- Simplify Java scenarios: clean assemble, first use, change test,
getting IDE models, dependency report, abi change, non-abi change
- Adjust tests to not use old test projects anymore
- Add file mutators