Updated form functionality controllers to use currentPatient and currentVisit. Updated the model configurator to
infer currentVisit from a request param called encounterId
Added draft version of a groovy script to generate a testing dataset of concepts from a constants Java class
Updated kenyaemr's encounter saving logic so that MOH257 form submissions can move between visits
* EnterHtmlFormFragmentController clears the existing visit before an MOH257 is saved
* EncounterServiceAdvice invokes the visit handler for an existing encounter (for which it wouldn't usually be invoked)
* EmrVisitAssignmentHandler saves it into an appropriate visit