Remove use of nose attrib plugin and most unittest

Some simple cases that do not use mox still use unittest directly.
Replacing unittest.TestCase with HeatTestCase has the added benefit of
capturing all logging for reporting during failure.

Change-Id: I76192bdb91822055f1e2f7d2e806bf094d399304

heat/tests/test_autoscaling.py

@@ -18,11 +18,8 @@ import datetime
 import copy
 
 import eventlet
-import unittest
 import mox
 
-from nose.plugins.attrib import attr
-
 from heat.common import context
 from heat.common import template_format
 from heat.engine.resources import autoscaling as asc
@@ -32,19 +29,15 @@ from heat.engine import parser
 from heat.engine import scheduler
 from heat.engine.resource import Metadata
 from heat.openstack.common import timeutils
+from heat.tests.common import HeatTestCase
 from heat.tests.utils import setup_dummy_db
 
 
-@attr(tag=['unit', 'resource'])
-@attr(speed='fast')
-class AutoScalingTest(unittest.TestCase):
+class AutoScalingTest(HeatTestCase):
     def setUp(self):
-        self.m = mox.Mox()
+        super(AutoScalingTest, self).setUp()
         setup_dummy_db()
 
-    def tearDown(self):
-        self.m.UnsetStubs()
-
     def load_template(self):
         self.path = os.path.dirname(os.path.realpath(__file__)).\
             replace('heat/tests', 'templates')