Merge pull request #136 from deba/komal

Komal
Merge pull request #137 from deba/kiran

Kiran
methods added to fetch and set values in the entity graph object
separate exception class created for graph related exception
test class for testing new setter and getter methods for graph
added more assert for the get graph value test
changes for updating the value from the entity in execution
test case testing the new impl
Merge pull request #138 from deba/mahesh

Mahesh