* Renamed LexEvsFakeData and LexEvsUtils to FakeLexEvsData and
CommonTestUtils respectively. 
* Created new class FakeLexEvsSystem that now contains an instance of
FakeLexEvsData
* Updated LexEvsCodeSystemVersionQueryServiceTestIT to use
FakeLexEvsSystem instead of FakeLexEvsData (or LexEvsFakeData)
* Fixed bug in LexEvsCodeSystemVersionQueryService