Drop needsToRun from get_graph_json method in smvapp

[ninjapapa]

Current get_graph_json method has module state (needToRun). Need to create a method which just return the module dependency graph without the module state info. Will name that method as get_module_graph_json.

As client code converted to use:

• get_module_graph_json, and
• get_module_state_json

will deprecate get_graph_json method.

[ninjapapa]

As discussed with @cloudysail we will do this in 2 steps:

• Made get_module_state_json take a list of FQNs instead of call dsm.allDataSets()
• After client code side changes to call get_module_state_json after calling get_graph_json(), removed the needsToRun field from get_graph_json() result

Will create 2 PRs.