Implemented groupBy for subquery to fetchAvailableTask and added debug logs
Implemented to fetchAvailableTask from RemoteTMSClient without meta data

Conflicts:
	tms-client/src/main/java/org/intalio/tempo/workflow/tms/client/LocalTMSClient.java
WF-1638 - Validations for past dates are done in server side.
Fixed WF-1581, WF-1433 , Now Task is visible to the reassigned users if any user claimed and revoked it.