Log time of the apply_func only if it took more than 0.1 second

It seems that logging start and end time of the
neutron_lib.db.resource_extend.apply_func function is little bit too
much for e.g. our gate as neutron-server logs are huge in such case.

So lets use directly oslo_utils.timeutils.time_it() function and log end
of such calls only if it will take more than 0.1 seconds. If function
was executed in shorter time, it isn't really necessary to have it
logged.

Change-Id: I3931c4f7cac4df72d71403ebcaa6ec0b83756640
Closes-Bug: #1892017

neutron_lib/db/resource_extend.py

@@ -18,9 +18,15 @@ NOTE: This module shall not be used by external projects. It will be moved
 import collections
 import inspect
 
+from oslo_log import log as logging
+from oslo_utils import timeutils
+
 from neutron_lib.utils import helpers
 
 
+LOG = logging.getLogger(__name__)
+
+
 # This dictionary will store methods for extending API resources.
 # Extensions can add their own methods by invoking register_funcs().
 _resource_extend_functions = {
@@ -70,7 +76,7 @@ def get_funcs(resource):
     return _resource_extend_functions.get(resource, [])
 
 
-@helpers.timecost
+@timeutils.time_it(LOG, min_duration=0.1)
 def apply_funcs(resource_type, response, db_object):
     """Appy registered functions for the said resource type.