Now, keystone roles are mapped to user roles
UI gets a list of user roles that the logged-in user has access.
Based on this role list,corresponding feature menus are shown in UI

Change-Id: Ic4b235c54b00229cf84a8e3fc5d01348698b59c9
Merge "Now, keystone roles are mapped to user roles UI gets a list of user roles that the logged-in user has access. Based on this role list,corresponding feature menus are shown in UI"