virt: error in log when log exception in guestfs.py

[Jesse]

In this code review, https://review.openstack.org/#/c/104262/ brings an error in log because of the line at 137:
+ LOG.info(_LI("Unable to force TCG mode, libguestfs too old?"),
+ ex)

Error is:

Traceback (most recent call last):
  File "/usr/lib/python2.7/logging/__init__.py", line 851, in emit
    msg = self.format(record)
  File "/opt/stack/nova/nova/openstack/common/log.py", line 685, in format
    return logging.StreamHandler.format(self, record)
  File "/usr/lib/python2.7/logging/__init__.py", line 724, in format
    return fmt.format(record)
  File "/opt/stack/nova/nova/openstack/common/log.py", line 649, in format
    return logging.Formatter.format(self, record)
  File "/usr/lib/python2.7/logging/__init__.py", line 464, in format
    record.message = record.getMessage()
  File "/usr/lib/python2.7/logging/__init__.py", line 328, in getMessage
    msg = msg % self.args
TypeError: not all arguments converted during string formatting
Logged from file guestfs.py, line 139

To fix this issue, we just need to add %s

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/111958

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/111958
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=34558259058e19f9c4b2a96cbb97770883460ded
Submitter: Jenkins
Branch: master

commit 34558259058e19f9c4b2a96cbb97770883460ded
Author: jufeng <email address hidden>
Date: Tue Aug 5 16:30:59 2014 +0800

    Fix error in log when log exception in guestfs.py

    This code review: https://review.openstack.org/#/c/104262/
    brings an issue when log exception in guestfs.py at
    LOG.info(_LI("Unable to force TCG mode, libguestfs too old?")
    To fix this issue we just need to add %s in it.

    Change-Id: Ic33a6b7c2ce49e21e96a087984aba6656065d8fc
    Closes-bug: #1352768