replace string format arguments with function parameters

There are files containing string format arguments inside
logging messages. Using logging function parameters should
be preferred.

Change-Id: I456f411ad6ca46a8c8de442c74c18276faca920e
Partial-Bug: #1321274

oslo/vmware/common/loopingcall.py

@@ -79,7 +79,7 @@ class FixedIntervalLoopingCall(LoopingCallBase):
                         break
                     delay = interval - timeutils.delta_seconds(start, end)
                     if delay <= 0:
-                        LOG.warn(_('task run outlasted interval by %s sec') %
+                        LOG.warn(_('task run outlasted interval by %s sec'),
                                  -delay)
                     greenthread.sleep(delay if delay > 0 else 0)
             except LoopingCallDone as e:

oslo/vmware/exceptions.py

@@ -118,7 +118,8 @@ class VMwareDriverException(Exception):
                 # log the issue and the kwargs
                 LOG.exception(_('Exception in string format operation'))
                 for name, value in six.iteritems(kwargs):
-                    LOG.error("%s: %s" % (name, value))
+                    LOG.error("%(name)s: %(value)s",
+                              {'name': name, 'value': value})
                 # at least get the core message out if something happened
                 message = self.msg_fmt