Add OctopusEngineTest case.
Merge remote-tracking branch 'origin/feature/mock_engine' into feature/mock_engine
Fixed test to use lower case adaptor names
Merge remote-tracking branch 'origin/develop' into feature/mock_engine
Add tests which use mockito to mock.
Add comment for stub reason.
Add mockito library for mocking in unit tests.
We don't use powermock.
So remove it's jar.
Add test for FilesEngine.setOwner().
Merge remote-tracking branch 'origin/develop' into feature/mock_engine
Merge remote-tracking branch 'origin/feature/mock_engine' into feature/mock_engine
Add tests for FilesEngine.copy().

Refactor creation of fakes into methods.
Merge remote-tracking branch 'origin/develop' into feature/mock_engine
throw OctopusIOException.
Merge pull request #7 from NLeSC/feature/mock_engine

Add API tests.