Remove tempest.common data_utils

Now most OpenStack projects have switched to use tempest.lib data_utils.
Then we can remove old tempest.common data_utils for the cleanup.

Ref: http://lists.openstack.org/pipermail/openstack-dev/2017-March/113942.html

Change-Id: Iba05bc604f447f2acaf4cd81e05443b366b821a1
diff --git a/tempest/api/identity/admin/v3/test_oauth_consumers.py b/tempest/api/identity/admin/v3/test_oauth_consumers.py
index f06fb8f..970ead3 100644
--- a/tempest/api/identity/admin/v3/test_oauth_consumers.py
+++ b/tempest/api/identity/admin/v3/test_oauth_consumers.py
@@ -14,7 +14,7 @@
 #    under the License.
 
 from tempest.api.identity import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib.common.utils import test_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as exceptions
diff --git a/tempest/common/utils/__init__.py b/tempest/common/utils/__init__.py
index 84e31d0..e69de29 100644
--- a/tempest/common/utils/__init__.py
+++ b/tempest/common/utils/__init__.py
@@ -1,38 +0,0 @@
-# Copyright (c) 2015 Hewlett-Packard Development Company, L.P.
-#
-#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-#    not use this file except in compliance with the License. You may obtain
-#    a copy of the License at
-#
-#         http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.
-
-from functools import partial
-
-from tempest import config
-from tempest.lib.common.utils import data_utils as lib_data_utils
-
-CONF = config.CONF
-
-
-class DataUtils(object):
-    def __getattr__(self, attr):
-
-        if attr == 'rand_name':
-            # NOTE(flwang): This is a proxy to generate a random name that
-            # includes a random number and a prefix if one is configured in
-            # CONF.resources_prefix
-            attr_obj = partial(lib_data_utils.rand_name,
-                               prefix=CONF.resources_prefix)
-        else:
-            attr_obj = getattr(lib_data_utils, attr)
-
-        self.__dict__[attr] = attr_obj
-        return attr_obj
-
-data_utils = DataUtils()