Issue 868: re-defined ilmSessionFacet/session relationship as one-to-one, updated class methods and members accordingly.
Issue 868: re-defined ilmSessionFacet/session relationship as one-to-one, updated class methods and members accordingly.

justinchu17/ilios,thecoolestguy/ilios,justinchu17/ilios,ilios/ilios,Trott/ilios,thecoolestguy/ilios,Trott/ilios,stopfstedt/ilios,justinchu17/ilios,dartajax/ilios,dartajax/ilios,ilios/ilios,justinchu17/ilios,stopfstedt/ilios