Allow OS::Heat::Stack to access remote stack from another OpenStack
provider. Also enable functional tests for multi-cloud.
Implement multi-cloud support as an extension to the existing multi-region
support. Allow operate a remote stack (from another OpenStack cloud) as a
resource in stack from local OpenStack cloud.
I propose we add multi cloud support into ``OS::Heat::Stack`` and change the
property schema for ``context``. Within context, we should adding
following properties:
* credential_secret_id: ID of Barbican Secret. Which stores authN
information for remote cloud.
Service will use auth information from Barbican Secret to access
Orchestration service in another OpenStack.
Must make sure you're able toget that secret from Barbican service when
provide `credential_secret_id` property.
Story: #2002126
Task: #26907
Depends-On: https://review.openstack.org/579750
Change-Id: I2f3de3e7c29cf7debb1474228c8a9a81725a72ed
6990331639