Comment 2 for bug 1421966

Reviewed: https://review.openstack.org/156763
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=6ecf99c779c3373acaa6650f15116abade1207f1
Submitter: Jenkins
Branch: master

commit 6ecf99c779c3373acaa6650f15116abade1207f1
Author: lin-hua-cheng <email address hidden>
Date: Tue Feb 17 12:46:38 2015 -0800

    Remove check_role_for_trust from sample policies

    The "identity:check_role_for_trust" was defined in the sample
    policy files but there is no actual mapping for it, so setting
    a value for this target has no effect. If or when the
    mapping gets added then this target must be added back in.

    Fixed the double protected call in "get_role_for_trust" by changing its
    call to a private unprotected version of "check_role_for_trust".

    Also, marking the public version of "check_role_for_trust" as deprecated
    for future cleanup.

    Change-Id: I1c2b1186e37e31eaf556f81db686cc362768a5ae
    Closes-Bug: #1421966