Replace using tests.utils with openstack.common.test

It is the first step to replace using tests.utils with openstack.common.test.
All these tests don't use mock objects, stubs, config files and use only
BaseTestCase class.

Change-Id: I511816b5c9e6c5c34ebff199296ee4fc8b84c672
bp: common-unit-tests

tests/unit/test_importutils.py

@@ -19,10 +19,10 @@ import datetime
 import sys
 
 from openstack.common import importutils
-from tests import utils
+from openstack.common import test
 
 
-class ImportUtilsTest(utils.BaseTestCase):
+class ImportUtilsTest(test.BaseTestCase):
 
     # NOTE(jkoelker) There has GOT to be a way to test this. But mocking
     #                __import__ is the devil. Right now we just make

tests/unit/test_network_utils.py

@@ -16,10 +16,10 @@
 #    under the License.
 
 from openstack.common import network_utils
-from tests import utils
+from openstack.common import test
 
 
-class NetworkUtilsTest(utils.BaseTestCase):
+class NetworkUtilsTest(test.BaseTestCase):
 
     def test_parse_host_port(self):
         self.assertEqual(('server01', 80),

tests/unit/test_strutils.py

@@ -20,10 +20,10 @@ import mock
 import six
 
 from openstack.common import strutils
-from tests import utils
+from openstack.common import test
 
 
-class StrUtilsTest(utils.BaseTestCase):
+class StrUtilsTest(test.BaseTestCase):
 
     def test_bool_bool_from_string(self):
         self.assertTrue(strutils.bool_from_string(True))

tests/unit/test_timeutils.py

@@ -21,11 +21,11 @@ import datetime
 import iso8601
 import mock
 
+from openstack.common import test
 from openstack.common import timeutils
-from tests import utils
 
 
-class TimeUtilsTest(utils.BaseTestCase):
+class TimeUtilsTest(test.BaseTestCase):
 
     def setUp(self):
         super(TimeUtilsTest, self).setUp()
@@ -181,7 +181,7 @@ class TimeUtilsTest(utils.BaseTestCase):
             self.assertTrue(timeutils.is_soon(expires, 0))
 
 
-class TestIso8601Time(utils.BaseTestCase):
+class TestIso8601Time(test.BaseTestCase):
 
     def _instaneous(self, timestamp, yr, mon, day, hr, min, sec, micro):
         self.assertEquals(timestamp.year, yr)