added method to include encounter subquery specifications when getting observations
efficiency improvements to PEP start stop date rule and added unit tests
fixed PEP start/stop tests
Merge pull request #34 from jlkeiper/REPORTS-73

REPORTS-73 - adding unit test for PEP Start/Stop Date rule
changed to using lists for start and stop drugs in drug-date-related rules and validators for start and stop observations
removed unneeded patient lookup
added unit tests for CTX start / stop dates
Merge pull request #35 from jlkeiper/REPORTS-79

REPORTS-79 - adding unit tests for MOH CTX start / stop dates
removed unneeded lines from a few tests
modified rule and added tests for MOH Flucanozole start/stop dates
minor edit
updated rule and added tests for Reasons for PEP rule
Merge pull request #36 from jlkeiper/REPORTS-75

REPORTS-75 - Reasons For PEP Rule tests
Merge pull request #37 from jlkeiper/REPORTS-77

REPORTS-77 - Fluconazole start/stop date tests
update to names rule tests
updates to unique identifier rule tests
moved concept-to-name comparison helper method to util
updated Date ART started rule and added tests
Merge pull request #38 from jlkeiper/REPORTS-78

REPORTS-78 - Date ART Started unit tests
modified rule to use concept sets and added unit tests