Handle func tests of swift cluster that hide /info

If a swift cluster configures the proxy server to not accept
/info requests, just do the best we can, skipping tests as
necessary.

To that end, if cors mode is not known we also skip the test.

Change-Id: I34f296c8717e0baf24ae552a7e38f9354ee91974

test/functional/__init__.py

@@ -347,7 +347,13 @@ def get_cluster_info():
         # test.conf data
         pass
     else:
-        eff_constraints.update(cluster_info.get('swift', {}))
+        try:
+            eff_constraints.update(cluster_info['swift'])
+        except KeyError:
+            # Most likely the swift cluster has "expose_info = false" set
+            # in its proxy-server.conf file, so we'll just do the best we
+            # can.
+            print >>sys.stderr, "** Swift Cluster not exposing /info **"
 
     # Finally, we'll allow any constraint present in the swift-constraints
     # section of test.conf to override everything. Note that only those

test/functional/test_object.py

@@ -916,6 +916,11 @@ class TestObject(unittest.TestCase):
         if tf.skip:
             raise SkipTest
 
+        try:
+            strict_cors = tf.cluster_info['swift']['strict_cors_mode']
+        except KeyError:
+            raise SkipTest("cors mode is unknown")
+
         def put_cors_cont(url, token, parsed, conn, orig):
             conn.request(
                 'PUT', '%s/%s' % (parsed.path, self.container),
@@ -989,11 +994,6 @@ class TestObject(unittest.TestCase):
         resp.read()
         self.assertEquals(resp.status, 401)
 
-        try:
-            strict_cors = tf.cluster_info['swift']['strict_cors_mode']
-        except KeyError:
-            strict_cors = False
-
         if strict_cors:
             resp = retry(check_cors,
                          'GET', 'cat', {'Origin': 'http://m.com'})