Today, Keystone resources (domains, tenants, etc) are created only if
'keystone' service is started.
When running Keystone in WSGI, the autorequire is broken for those
resources.
Adding 'httpd' in autorequire is not enough because it could fail to
orchestration issues if running another httpd resource (Horizon) that
depends on having Keystone started.
This patch is about to create an Anchor (keystone_started) in
keystone::service that require Service['keystone'] resource to be
created.
In resource types, change the autorequire to depend on the new Anchor.
With that patch, we are sure Keystone resources won't be created before
service is actually managed (running or stopped) and other resources
(Horizon, using httpd server) can also depend on this Anchor if needed.
Change-Id: Ie72b65b6be224cadc8730e050bec38d2face5dfd
Closes-bug: #1474059
c11b0408ef