Hemanth, Vinay | Refactoring. Ensure sorting takes place only within BahmniObservation.
Sorting class EncounterTransactionObsMapper based sorting removed
Springified several mapper classes.
Minor refactoring to extract ConceptCache
Refactor BahmniObservationMapper to extract ETObs to BahmniObs mapping to a different class.
Remove necessity to pass in rootConcepts to the mapper
Reduce number of interface methods in BahmniObservationMapper