Metadata widget doesn't handle readonly flag

[Kamil Rykowski]

Metadata widget doesn't handle the `readonly` flag for properties which is returned by Glance API. If the property is defined as `readonly` the input should stick to the default value of the property.

The readonly flag has been introduced in Glance in bug report: https://bugs.launchpad.net/glance/+bug/1406235

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/165046

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/165046
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=497beacf7c382819920dd2fa62e6b4f141093169
Submitter: Jenkins
Branch: master

commit 497beacf7c382819920dd2fa62e6b4f141093169
Author: Szymon Wroblewski <email address hidden>
Date: Tue Mar 17 13:15:49 2015 +0100

    Metadata widget support for readonly flag

    Metadata widget doesn't handle the `readonly` flag for properties which is
    returned by Glance API. If the property is defined as `readonly` the input
    should stick to the default value of the property.

    The readonly flag has been introduced in Glance in bug report:
    https://bugs.launchpad.net/glance/+bug/1406235

    This patch adds support for readonly flag in metadata widget.

    Closes-Bug: 1433026
    Change-Id: I79e2b7c8a397f6b19659d6e13f7fad29bc26892e