change meter.resource_metadata column type to Text

[Doug Hellmann]

The existing schema limits the column to 5000 characters, which may not be enough for a large metadata payload encoded as JSON. Using a Text column will let us store an arbitrary amount of data in that column without worrying about overflowing.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/40822

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/40822
Committed: http://github.com/openstack/ceilometer/commit/c92383e1cafbe01238b3c7e44ff7599c370cbc7d
Submitter: Jenkins
Branch: master

commit c92383e1cafbe01238b3c7e44ff7599c370cbc7d
Author: Svetlana Shturm <email address hidden>
Date: Thu Aug 8 12:35:36 2013 +0400

    Change meter.resource_metadata column type

    The existing schema limits for meter.resource_metadata column to
    5000 characters, which may not be enough for a large metadata
    payload encoded as JSON.
    Using a Text column will let us store an arbitrary amount of data
    in that column without worrying about overflowing.

    Closes-Bug: #1204638

    Change-Id: I5eb1cdbb3d4770a8348682634a78ccb0f843c141