Replace oslo_utils.fnmatch with fnmatch
The oslo_utils.fnmatch module was added to solve an issue in py2.7 but
it is no longer required because py2.7 is no longer supported.
The module was deprecated since oslo.utils 4.9.1[1] and the stdlib's
fnmatch module should be used instead.
[1]
# License for the specific language governing permissions and limitations
# under the License.
+import fnmatch
import logging
-from oslo_utils import fnmatch
-
from heatclient._i18n import _
from heatclient import exc
