reset policy per test

reset global ENFORCER after every time to ensure test isolation

Change-Id: I752721cc8071a8f8a480d6a7110392517c6bae91
Closes-Bug: #1506151

ceilometer/api/rbac.py

@@ -25,6 +25,13 @@ _ENFORCER = None
 CONF = cfg.CONF
 
 
+def reset():
+    global _ENFORCER
+    if _ENFORCER:
+        _ENFORCER.clear()
+        _ENFORCER = None
+
+
 def _has_rule(name):
     return name in _ENFORCER.rules.keys()
 

ceilometer/tests/functional/api/__init__.py

@@ -21,6 +21,7 @@ from oslo_policy import opts
 import pecan
 import pecan.testing
 
+from ceilometer.api import rbac
 from ceilometer.tests import db as db_test_base
 
 OPT_GROUP_NAME = 'keystone_authtoken'
@@ -70,6 +71,7 @@ class FunctionalTest(db_test_base.TestBase):
 
     def tearDown(self):
         super(FunctionalTest, self).tearDown()
+        rbac.reset()
         pecan.set_config({}, overwrite=True)
 
     def put_json(self, path, params, expect_errors=False, headers=None,