Remove unused policy rule for trust

[Lin Hua Cheng]

There are couple of policy rule that are unused for trust, even if the user updates the rule it won't impact the policy check.

we should clean this up to avoid confusion.

This is step #1 as for fixing the policy rule for trust. See : https://bugs.launchpad.net/keystone/+bug/1280084

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/174155

[Dolph Mathews (dolph)]

Eek, that's super misleading. Although the presence of that rule would have no negative impact on the operation of Keystone, I'm tempted to suggest this for backporting as well, just to avoid bugs being filed in the future.

[Lin Hua Cheng (lin-hua-cheng)]

Yeah. I tried to consume the rule, but ended up breaking backward compatibility for upgrades. I had to fix the policy.json, but that file doesn't get updated during upgrade. So the users will end-up in a broken state. You can find more details in https://bugs.launchpad.net/keystone/+bug/1280084

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/174155
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=060081cc9136bb9eae12ec59263002078bc5d4b8
Submitter: Jenkins
Branch: master

commit 060081cc9136bb9eae12ec59263002078bc5d4b8
Author: lin-hua-cheng <email address hidden>
Date: Wed Apr 15 16:33:09 2015 -0700

    Remove unused policy rule for get_trust

    The policy rule for get_trust is misleading for operators
    since it is not used by the trust controller.

    Change-Id: I885ccbafef8bb9ca73ca6fab110176291bb3a542
    Closes-Bug: #1444748