Use tempest.lib.decorators instead of nose

* tempest.lib.decorators provides a better way to handle attrs, let's
  use it instead of using nose from tempest.lib stable api.

Change-Id: Iad64bbaac517b8e1f53ec7046691a79e63f4f74d

murano_tempest_tests/tests/functional/integration/test_mistral.py

@@ -14,12 +14,12 @@
 
 import uuid
 
-from nose.plugins.attrib import attr as tag
-
 import murano_tempest_tests.tests.functional.common.utils as common_utils
 import murano_tempest_tests.tests.functional.integration.integration_base \
     as core
 
+from tempest.lib import decorators
+
 
 class MistralTest(core.MistralIntegration):
 
@@ -42,7 +42,7 @@ class MistralTest(core.MistralIntegration):
         with common_utils.ignored(Exception):
             cls.purge_uploaded_packages()
 
-    @tag('all', 'coverage')
+    @decorators.attr(type=['all', 'coverage'])
     def test_deploy_package_success(self):
         # Test expects successful deployment and one output: input_1_value.
 

murano_tempest_tests/tests/functional/integration/test_policy_enf.py

@@ -13,12 +13,13 @@
 # under the License.
 
 import muranoclient.common.exceptions as murano_exceptions
-from nose.plugins.attrib import attr as tag
 
 import murano_tempest_tests.tests.functional.common.utils as common_utils
 import murano_tempest_tests.tests.functional.integration.integration_base \
     as core
 
+from tempest.lib import decorators
+
 
 class PolicyEnforcementTest(core.CongressIntegration):
 
@@ -40,7 +41,7 @@ class PolicyEnforcementTest(core.CongressIntegration):
         super(PolicyEnforcementTest, self).tearDown()
         self.purge_environments()
 
-    @tag('all', 'coverage')
+    @decorators.attr(type=['all', 'coverage'])
     def test_deploy_policy_fail_key(self):
         """Test expects failure due to empty key name.
 
@@ -55,7 +56,7 @@ class PolicyEnforcementTest(core.CongressIntegration):
                                   flavor='m1.small'),
             'missing key')
 
-    @tag('all', 'coverage')
+    @decorators.attr(type=['all', 'coverage'])
     def test_deploy_policy_fail_flavor(self):
         """Test expects failure due to blacklisted flavor
 
@@ -69,7 +70,7 @@ class PolicyEnforcementTest(core.CongressIntegration):
                                   key='test-key'),
             'bad flavor')
 
-    @tag('all', 'coverage')
+    @decorators.attr(type=['all', 'coverage'])
     def test_set_property_policy(self):
         """Tests environment modification by policy
 

requirements.txt

@@ -10,7 +10,6 @@ oslo.utils>=3.33.0 # Apache-2.0
 testtools>=2.2.0 # MIT
 tempest>=17.1.0 # Apache-2.0
 requests>=2.14.2 # Apache-2.0
-nose>=1.3.7 # LGPL
 testresources>=2.0.0 # Apache-2.0/BSD
 
 python-keystoneclient>=3.8.0 # Apache-2.0