Hammer CLI

Description of problem:
hammer $command --help should provide mandatory and optional parameter difference

How reproducible:
everytime

Steps to Reproduce:
1.# hammer user create --help
Usage:
hammer user create [OPTIONS]

Options:
--login LOGIN
--firstname FIRSTNAME
--lastname LASTNAME
--mail MAIL
--admin ADMIN Is an admin account?
--password PASSWORD
--auth-source-id AUTH_SOURCE_ID
-h, --help print help

2.
3.

Actual results:
here there the mandatory and optional parameters are not mentioned

Expected results:
Make it more user friendly so that one can differentiate between mandatory and optional parameters

(https://bugzilla.redhat.com/show_bug.cgi?id=1044455)