Rootwrap pid check raises exception

[Vish Ishaya]

If the second paramater of a rootwrapped command is not an integer and there are exactly two parameters, the rootwrap filter will raise an exception. This breaks later filters that might match.

For example:

$ ./bin/nova-rootwrap cat test
Traceback (most recent call last):
  File "./bin/nova-rootwrap", line 63, in <module>
    filtermatch = wrapper.match_filter(filters, userargs)
  File "/Users/vishvananda/cache/stack/nova/nova/rootwrap/wrapper.py", line 51, in match_filter
    if f.match(userargs):
  File "/Users/vishvananda/cache/stack/nova/nova/rootwrap/filters.py", line 116, in match
    pid = int(args[1])
ValueError: invalid literal for int() with base 10: 'test'

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/3778

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/3778
Committed: http://github.com/openstack/nova/commit/4ce6645f08fffa194f76e5d4105bfb77b6c8cd14
Submitter: Jenkins
Branch: master

commit 4ce6645f08fffa194f76e5d4105bfb77b6c8cd14
Author: Vishvananda Ishaya <email address hidden>
Date: Fri Feb 3 15:44:29 2012 -0800

    Makes sure killfilter doesn't raise ValueError

     * Fixes bug 926412
     * Includes failing test

    Change-Id: Ie0105ff777575d6dd794ce5b5e08545fb54ecf8b