log take_action parameters in a single place

Previously each command logs take_action parameters explicitly
by using @utils.log_method decorator or log.debug().
Some commands have no logging.

This commit calls a logger in the base class and
drops all logging definition from individual commands.

Closes-Bug: #1532294
Change-Id: I43cd0290a4353c68c075bade9571c940733da1be

openstackclient/common/command.py

@@ -31,7 +31,10 @@ class CommandMeta(abc.ABCMeta):
 
 @six.add_metaclass(CommandMeta)
 class Command(command.Command):
-    pass
+
+    def run(self, parsed_args):
+        self.log.debug('run(%s)', parsed_args)
+        return super(Command, self).run(parsed_args)
 
 
 class Lister(Command, lister.Lister):

openstackclient/common/timing.py

@@ -13,19 +13,13 @@
 
 """Timing Implementation"""
 
-import logging
-
-from cliff import lister
+from openstackclient.common import command
 
 
-class Timing(lister.Lister):
+class Timing(command.Lister):
     """Show timing data"""
 
-    log = logging.getLogger(__name__ + '.Timing')
-
     def take_action(self, parsed_args):
-        self.log.debug('take_action(%s)' % parsed_args)
-
         column_headers = (
             'URL',
             'Seconds',