Description of problem:
Secure environments that require passwords with upper, lower, number and special characters for passwords face issues to deploy when this is set in KeystonePasswordRegex. 

Version-Release number of selected component (if applicable):
16.2

How reproducible:
always

Steps to Reproduce:
1. Deploy stack passing:

KeystonePasswordRegex: '^(?=.*?[a-zA-Z])(?=.*?[0-9])(?=.*?[#?!@\\/<>[:;{}`|.,_=~+$%^&*-]).{8,}$'


Actual results:

- Deployment fails at 
2021-11-27 07:38:39.326392 | fa163eee-113c-13d6-a539-0000000082fd |      FATAL | Wait for containers to start for step 3 using paunch | ctl-01 | error={"ansible_job_id": "167488509998.95659", "attempts": 93, "ch

 - Containers are not starting

 - Keystone log shows a CRITICAL issue while running _bootstrap_admin_user()

keystone/keystone.log:2021-11-27 13:36:40.411 61 CRITICAL keystone [req-ac9dceb9-f3d2-447e-a7a9-aef48b870675 - - - - -] Unhandled error: keystone.exception.PasswordRequirementsValidationError: The password does not match the requirements: None.                      

 - Seems like the admin user does not meet the regexp criteria


Expected results:

Deploy should succeed

Additional info: