restapi : Create user API fails in SDK & CLI fails

Create user fails with error HTTP 400
Request syntactically incorrect from
SDK and CLI

Change-Id: I308f5ebe3a7bcd4d980c7186fa995c704938ec93
Bug-Url: https://bugzilla.redhat.com/1122589
Signed-off-by: Ravi Nori <rnori@redhat.com>