Improve GradlePackagingTest and update Gradle tooling API to new version
Minor fixes
Improve GradleFacet.executeTask API (return boolean instead of void)
Fix forge.gradle (profile property is now taken from project properties
not project.ext as before)
Fix GradleManager bug (buildLauncher.withArguments works differently
than supposed)
Fix GradleDependencyFacetTest
Add get(Direct/Managed)Dependencies() to GradleSourceUtil