fix: set keystone federation default_authorization_ttl to 12 hours

[nicholaskuechler]

Problem creating application credentials in keystone:

❯ openstack application credential create terraform-cred --restricted
BadRequestException: 400: Client Error for url: https://keystone.internal/v3/users/b22322eb26e893803f1839640e7de6c9647892c8cffe75b7603f9b168ef1afec/application_credentials, Invalid application credential: Could not find role assignment with role: 4a5321ded95d4c2caa3ebb329fd12dd5, user or group: b22322eb26e893803f1839640e7de6c9647892c8cffe75b7603f9b168ef1afec, project, domain, or system: 9c5848c68f1c41d181365eea45ed804b.

I came across some keystone bug reports:

• https://bugs.launchpad.net/keystone/+bug/1978833
• https://bugs.launchpad.net/keystone/+bug/1832092

Which led to the same solution, setting default_authorization_ttl to something greater than 0 when federating:

• https://docs.openstack.org/keystone/latest/configuration/config-options.html#federation.default_authorization_ttl

I just gave this a try in dev and was able to successfully create an application credential: