EC2 API: DescribeTags wildcards not working

[Burt Holzman]

The EC2 API supports glob-style wildcards in filters.

http://docs.aws.amazon.com/AWSEC2/latest/APIReference/ApiReference-query-DescribeTags.html

"You can use wildcards in a filter value. An asterisk (*) matches zero or more characters, and a question mark (?) matches exactly one character. You can escape special characters using a backslash (\) before the character. For example, a value of \*amazon\?\\ searches for the literal string *amazon?\."

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/38697
Committed: http://github.com/openstack/nova/commit/92120d3247b239a2a54e60407a271b531b533151
Submitter: Jenkins
Branch: master

commit 92120d3247b239a2a54e60407a271b531b533151
Author: Burt Holzman <email address hidden>
Date: Thu Jul 25 00:54:32 2013 -0500

    Support EC2 API wildcards for DescribeTags filters

    The EC2 API supports glob-style wildcards in filters.

    From http://docs.aws.amazon.com/AWSEC2/latest/APIReference/ApiReference-query-DescribeTags.html:

    "You can use wildcards in a filter value. An asterisk (*) matches zero or more characters, and
    a question mark (?) matches exactly one character. You can escape special characters using a
    backslash (\) before the character. For example, a value of \*amazon\?\\ searches for the literal
    string *amazon?\."

    This patch converts the glob-style regex to a python regex and uses re.match to do the rest. The
    approach to the conversion was taken from the python fnmatch library.

    Fixes bug #1205099

    Change-Id: Ie9cac182faabf50fc0d40480db39a46a7e97fbec