When deploying with tls enabled in public
endpoints, ansible modules fails due SSL certificates
are self-signed.

This change adds a new variable to allow customization
on which endpoints ansible should connect.
Defaults to admin because admin auth parameters defaults
to admin endpoint.

Change-Id: Ic3ed58cf9c9579cae08a11bbfe6fce983b5a9cbc
Closes-Bug: #1720995

Change-Id: I1577cc3afef4dadd3a188c8ba749c9cdfad313ae

Usernames can be configured with variables in
configuration files, but user creation is hardcoded.

Change-Id: I057cfb921d776217db66f59226dcfa79f3eb7368
Closes-Bug: #1661587

Co-Authored-By: Mauricio Lima <mauriciolimab@gmail.com>
Change-Id: I9a4a6b6523dee4b388513386b7d85d421f2b7b89

Partially-Implements: blueprint ansible-aodh

Change-Id: I9e20f4bf5e7d8f37f243ae15746e2b7bb49eb20c