Limit formatting routes when adding resources like nova api

[inhye.park]

It is same bug such as nova in grizzly.
So in grizzly nova, It is already modified.

becuase of this, "cinder metadata function" not working in below situation.

1. cinder metadata $(volume_id) set Hadoop_TAG_1.2.2=samsung_service
2. cinder metadata $(volume_id) unset Hadoop_TAG_1.2.2
=> error!! ERROR: Metadata item was not found (HTTP 404)

So It must be modified.

By default, routes.mapper.Mapper.resource adds a bunch of formatted
routes that accept anything after a '.'. Our spec says only .xml
and .json are accepted so limit the formatting to those valuse.

This allows identifiers with a '.' in urls. A few tests were added
to the extensions test to prove that .xml and .json are stripped
but other values are not.

[inhye.park (cosmos0703)]

I finished the source as review site's comment.

The site is https://review.openstack.org/#/c/87520/.
I need a code review

Please check and approve.

[inhye.park (cosmos0703)]

The site is https://review.openstack.org/#/c/87520/.
My bug is stopped in workflow step.

Please check in the workflow.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/87520
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=e71d982aa1a21ad7b952fcb8516a9610a5902afb
Submitter: Jenkins
Branch: master

commit e71d982aa1a21ad7b952fcb8516a9610a5902afb
Author: Inhye Park <email address hidden>
Date: Tue Apr 15 18:48:44 2014 +0900

    Limit formatting routes when adding resources

    By default, routes.mapper.Mapper.resource adds a bunch of formatted
    routes that accept anything after a '.'. Our spec says only .xml
    and .json are accepted so limit the formatting to those valuse.

    This allows identifiers with a '.' in urls. A few tests were added
    to the extensions test to prove that .xml and .json are stripped
    but other values are not.

    Closes-bug: #1307956
    Change-Id: I8f0b4ae3b10ea93890f6506662905bd5823412f5