Switch to use stable data_utils

Tempest provides stable library interfaces under tempest.lib.
This patch switches to use it for data_utils.

Change-Id: Iea269ea8bba24795a341c8948e3d275eff8425fc
diff --git a/patrole_tempest_plugin/tests/api/identity/v3/test_credentials_rbac.py b/patrole_tempest_plugin/tests/api/identity/v3/test_credentials_rbac.py
index d51fecb..a563784 100644
--- a/patrole_tempest_plugin/tests/api/identity/v3/test_credentials_rbac.py
+++ b/patrole_tempest_plugin/tests/api/identity/v3/test_credentials_rbac.py
@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-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
 
diff --git a/patrole_tempest_plugin/tests/api/identity/v3/test_endpoints_rbac.py b/patrole_tempest_plugin/tests/api/identity/v3/test_endpoints_rbac.py
index 11b0064..dbdf8dc 100644
--- a/patrole_tempest_plugin/tests/api/identity/v3/test_endpoints_rbac.py
+++ b/patrole_tempest_plugin/tests/api/identity/v3/test_endpoints_rbac.py
@@ -13,8 +13,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib.common.utils import test_utils
 from tempest.lib import decorators
 
diff --git a/patrole_tempest_plugin/tests/api/identity/v3/test_groups_rbac.py b/patrole_tempest_plugin/tests/api/identity/v3/test_groups_rbac.py
index a9c998a..16e2dce 100644
--- a/patrole_tempest_plugin/tests/api/identity/v3/test_groups_rbac.py
+++ b/patrole_tempest_plugin/tests/api/identity/v3/test_groups_rbac.py
@@ -13,8 +13,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib.common.utils import test_utils
 from tempest.lib import decorators
 
diff --git a/patrole_tempest_plugin/tests/api/identity/v3/test_projects_rbac.py b/patrole_tempest_plugin/tests/api/identity/v3/test_projects_rbac.py
index 9d6467c..a00569d 100644
--- a/patrole_tempest_plugin/tests/api/identity/v3/test_projects_rbac.py
+++ b/patrole_tempest_plugin/tests/api/identity/v3/test_projects_rbac.py
@@ -13,8 +13,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 from patrole_tempest_plugin import rbac_rule_validation
diff --git a/patrole_tempest_plugin/tests/api/identity/v3/test_services_rbac.py b/patrole_tempest_plugin/tests/api/identity/v3/test_services_rbac.py
index e431216..42d0028 100644
--- a/patrole_tempest_plugin/tests/api/identity/v3/test_services_rbac.py
+++ b/patrole_tempest_plugin/tests/api/identity/v3/test_services_rbac.py
@@ -13,8 +13,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 from patrole_tempest_plugin import rbac_rule_validation
diff --git a/patrole_tempest_plugin/tests/api/orchestration/test_soft_config_rbac.py b/patrole_tempest_plugin/tests/api/orchestration/test_soft_config_rbac.py
index f0172c2..fa3840c 100644
--- a/patrole_tempest_plugin/tests/api/orchestration/test_soft_config_rbac.py
+++ b/patrole_tempest_plugin/tests/api/orchestration/test_soft_config_rbac.py
@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-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