Include:
-added test case for keystone user password rules under security
-editing set_user definition in keystone_helper
-editing create_user definition in keystone_helper
-adding set_current_user_password definition used by the testcase
-editing add definition for updating user dictionary in auth file
-editing get definition to handle attribute error in auth file
Story: 2007406
Task: 39011
Change-Id: I505519c40aa4fc9f58c11bab7ab39175e1c7098d
Author: Yang Liu <yang.liu@windriver.com>
Co-Authored-By: Hrishit Mazumder <hrishit.mazumder@windriver.com>
Signed-off-by: Hrishit Mazumder <hrishit.mazumder@windriver.com>