Create User API should return 4xx error for badly formatted requests (First issue!)

[kochhar]

Example:

• phoneVerified vs phoneNumberVerified

{"request": {"firstName":"Sanyog Kumar", 
                  "lastName":"Sanyog Kumar", 
                  "provider":"QCI", 
                  "email":"[email protected]", 
                  "emailVerified":true, 
                  "userName":"3000", 
                  "phone":"98736588333", 
                 "phoneVerified":true
        }
} 

This should return a 4xx error.