Re-enable 'check_trust_roles'

Re-enable the 'check_trust_roles' method. This can be
merged after the patches for change id
I13ce159cbe9739d4bf5d321fc4bd069245f32734 are merged
(master and stable/icehouse for Keystone).

This changeset updates the new location for the check_trust_role
HTTP status validation (in services/identity/v3/json/identity_client.py).
Previously this was located in identity/admin/v3/test_trusts.py.

Commented code indicating the above location change occurred has been
removed.

Change-Id: If1b7f18d7a357f4b3a4b478e300a17f2cc4a6159
Closes-Bug: #1334368
diff --git a/tempest/api/identity/admin/v3/test_trusts.py b/tempest/api/identity/admin/v3/test_trusts.py
index fed5171..1561a6e 100644
--- a/tempest/api/identity/admin/v3/test_trusts.py
+++ b/tempest/api/identity/admin/v3/test_trusts.py
@@ -150,7 +150,6 @@
         self.assertNotIn('v3/roles/%s' % self.not_delegated_role_id,
                          role['links']['self'])
 
-    @test.skip_because(bug='1334368')
     def check_trust_roles(self):
         # Check we find the delegated role
         _, roles_get = self.trustor_client.get_trust_roles(
@@ -164,12 +163,6 @@
 
         _, role_get = self.trustor_client.check_trust_role(
             self.trust_id, self.delegated_role_id)
-        # This tempest two-step change conflicted with the change
-        # moving response checking to the client. This test should be
-        # re-enabled by removing the following assert and changing
-        # the response code in tempest/services/identity/v3/json/
-        # identity_client.py in the check_trust_role_method.
-        # self.assertEqual('200', resp['status'])
 
         # And that we don't find not_delegated_role
         self.assertRaises(exceptions.NotFound,
diff --git a/tempest/services/identity/v3/json/identity_client.py b/tempest/services/identity/v3/json/identity_client.py
index 8c72dfa..939399b 100644
--- a/tempest/services/identity/v3/json/identity_client.py
+++ b/tempest/services/identity/v3/json/identity_client.py
@@ -498,10 +498,7 @@
         """HEAD Check if role is delegated by a trust."""
         resp, body = self.head("OS-TRUST/trusts/%s/roles/%s"
                                % (trust_id, role_id))
-        # This code needs to change to 200 when the keystone changes
-        # for bug 1334368 merge and check_trust_roles test is
-        # unskipped
-        self.expected_success(204, resp.status)
+        self.expected_success(200, resp.status)
         return resp, body