Fix test deps: remove (unused) mockito dependency

The (unused) mockito dependency brings hamcrest-core 1.1, which
breaks tests with jenkins-test-harness 1.532 (hamcrest 1.3).
Fix "neither onCreatedFromScratch nor onLoad called on ... yet" errors in tests
Fix typo (double semi-colon) to make Eclipse happy
Fix remaining test failures with deleted slaves
Compilation fix.
Merge branch 'master' into thomasgl-orange-fix-tests