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_aws_stack.py b/functional/test_aws_stack.py
index 172bc24..de8c6b8 100644
--- a/functional/test_aws_stack.py
+++ b/functional/test_aws_stack.py
@@ -20,12 +20,12 @@
 import yaml
 
 from heat_integrationtests.common import test
-
+from heat_integrationtests.functional import functional_base
 
 LOG = logging.getLogger(__name__)
 
 
-class AwsStackTest(test.HeatIntegrationTest):
+class AwsStackTest(functional_base.FunctionalTestsBase):
     test_template = '''
 HeatTemplateFormatVersion: '2012-12-12'
 Resources:
@@ -75,7 +75,6 @@
 
     def setUp(self):
         super(AwsStackTest, self).setUp()
-        self.client = self.orchestration_client
         self.object_container_name = AwsStackTest.__name__
         self.project_id = self.identity_client.auth_ref.project_id
         self.object_client.put_container(self.object_container_name)