Sync build.gradle with pom.xml

I still have one test not passing:
`org.robolectric.TestRunnerSequenceTest$SimpleTest > shouldDoNothingMuch`

There are also differences in test counters between maven and gradle builds.

Gradle:
`2082 tests completed, 1 failed, 27 skipped`
Maven:
`Tests run: 2015, Failures: 0, Errors: 0, Skipped: 18`