Unit Test for Common Data Set.

Path for corpus oriented unit tests is:  is /test/cvac/corpus
Cont. refactor of CommonDataSetTest, added bodies for some test methods.
Java dev for corpus branch, refactor of CommonDataSet
Remove hard coded path.
Merge branch 'corpus' of https://github.com/NPSVisionLab/CVAC into corpus

Conflicts:
	test/UnitTests/python/CorpusServerTest.py