update str_replace in hot sample

[JunJie Nan]

in hot/F18/WordPress_NoKey.yaml:
 str_replace:
        template: http://$host/wordpress
        params:
          host: { get_attr: [wordpress_instance, PublicIp] }
Since the str_replace usage changed.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/48110

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/48110
Committed: http://github.com/openstack/heat-templates/commit/5d603d892b780cbfb36e3a2afba4dc417a32a1ae
Submitter: Jenkins
Branch: master

commit 5d603d892b780cbfb36e3a2afba4dc417a32a1ae
Author: Thomas Spatzier <email address hidden>
Date: Tue Sep 24 20:03:57 2013 +0200

    Adapt WordPress_NoKey to changes in str_replace

    Adapt naming of parameters to the str_replace function to implementation
    changes in that function so the replacement works correctly. The following
    change introduces exact string matching, so we have to change from the
    previous python string template based notation:

    https://review.openstack.org/#/c/47772

    Note: the change to the HOT template depends on the change above being
    merged (or gets necessary as soon as this change is merged).

    Change-Id: I229bee76771b0b0f691943f9fa8ceaa8393de781
    Closes-Bug: #1229741