restapi : Add permit to role issues(#919202)

When trying to add permit to role the permit
name needs to accept both lower case and upper
case names.

Change-Id: I7ae176b9b6d60b4f8a51c16354ec6210f13870c9
Bug-Url: https://bugzilla.redhat.com/919202
Signed-off-by: Ravi Nori <rnori@redhat.com>