httpInvokerServiceClients.xml : set 'CdmServiceRequestExecutor' class as default...

httpInvokerServiceClients.xml : set 'CdmServiceRequestExecutor' class as default for all services
ICdmEntitySession, CdmEntitySession, MockCdmEntitySession : added method to update session
ICdmEntitySessionManager, CdmEntitySessionManager, MockCdmEntitySessionManager : added methods to set active session, dispose and update sessions
ProxyUtils : added utility method
EntityCacherDebugResult : corrected method to determine cache corresponding to entity
CdmTransientEntityCacher : corrected put method
CacheLoader : optimised recursive call
CdmServiceCacher : corrected methods to get from cache and load
CdmServiceRequestExecutor : added update result return calls to load