Expand bootstrap process to include creation of roles outlined in
basic default roles spec.
The bootstrap process now creates two new roles, 'reader' and 'member,
in addition to the well established 'admin' role. During this process,
a role implication[1] chain is created: 'admin' implies 'member' and
'member' implies 'reader'.
[1] - https://developer.openstack.org/api-ref/identity/v3/#create-role-inference-rule
Co-Authored-By: Juan Antonio Osorio Robles <jaosorior@redhat.com>
bp basic-default-roles
Depends-On: https://review.openstack.org/574149
Change-Id: Ie18a269e3d1075d955fe494acaf634a393c6bd7b
d44ed7f18c