move lib/config_update & specs
fixing deprecation warnings for lib/config_update
Merge pull request #236 from bsharanya/master

#130 Moved remaining api controllers to new rails.
Merge pull request #235 from srinivasupadhya/master

moved lib/config_update & spec (40). fixed deprecations.
#130 - Added files of api/agents_controller to new rails.
#130 - Changed api/agents_controller to work with new rails.