angshu | introduced enc_by_catchment table, refactored service, repository, controller code.
angshu | moved Catchment to domain package. Minor code and test improvements.
angshu | removed @deprecated for FindEncountersForFacilityCatchment
angshu | moved date parsing to DateUtil. moved parsing and validation and defaulting of "updatedSince" date to controller. EncounterService.findEncountersForFacilityCatchment takes a date now.
angshu | changed name of upazilla to upazila, changed ward_id to union_urban_ward_id,
angshu | renamed migration files. fixed minor bug in EncounterController