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: I1777929818ec895de106d31fa680ee006f428b35
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"