migration from EasyMock to Mockito
Merge pull request #118 from willschipp/BATCH-1947

* willschipp-BATCH-1947:
  migration from EasyMock to Mockito
BATCH-1770 - added step BatchStatus.UNKNOWN to SimpleJobLauncher before
starting the job
Merge pull request #119 from willschipp/BATCH-1770

* BATCH-1770:
  BATCH-1770 - added step BatchStatus.UNKNOWN to SimpleJobLauncher before starting the job