Add config entries to skip integration tests

This adds options to skip scenario and functional tests.
You can either skip the complete set of tests or list of specific
tests.

Following new config options are added:

`skip_scenario_tests` -  Skip all scenario tests
`skip_functional_tests` - Skip all functional tests
`skip_functional_test_list` - List of functional tests to skip
`skip_scenario_test_list` - List of scenario tests to skip
`skip_test_stack_action_list` - List of actions in tests to skip

Change-Id: I7a5233f5db1f065ccee5a97408c72203c108a656
Depends-On: I25c5e853f0499b88f2803b077d19e132140908f1
diff --git a/functional/test_swiftsignal_update.py b/functional/test_swiftsignal_update.py
index 0f1c43c..5321014 100644
--- a/functional/test_swiftsignal_update.py
+++ b/functional/test_swiftsignal_update.py
@@ -11,7 +11,7 @@
 #    under the License.
 
 
-from heat_integrationtests.common import test
+from heat_integrationtests.functional import functional_base
 
 test_template = '''
 heat_template_version: 2014-10-16
@@ -31,11 +31,10 @@
 '''
 
 
-class SwiftSignalHandleUpdateTest(test.HeatIntegrationTest):
+class SwiftSignalHandleUpdateTest(functional_base.FunctionalTestsBase):
 
     def setUp(self):
         super(SwiftSignalHandleUpdateTest, self).setUp()
-        self.client = self.orchestration_client
 
     def test_stack_update_same_template_replace_no_url(self):
         stack_identifier = self.stack_create(template=test_template)