Comment 1 for bug 1436409

Reviewed: https://review.openstack.org/170206
Committed: https://git.openstack.org/cgit/stackforge/merlin/commit/?id=5014b8de587947e2019f081d5b2b17e5c14c2af1
Submitter: Jenkins
Branch: master

commit 5014b8de587947e2019f081d5b2b17e5c14c2af1
Author: Timur Sufiev <email address hidden>
Date: Thu Apr 2 19:41:44 2015 +0300

    Enable the Workflow structure change on changing its type

    To enable this fix, a massive refactoring to panel/row/item - i.e.,
    the 'view' mixins - was done. Now these mixins are implemented as
    filters, which has the following benefits:
     * once the underlying Barricade model changes, the following change is
     immediately propagated to the view (input events are no longer
     catched by some obsolete piece of model just because view is not
     updated and is still sending events to an old model);
     * at the same time the filter results are memoized (with the
     appropriate function from underscore.js) so not infinite $digest
     looping happens, with the Barricade objects' string hash being used
     as a parts of a composite caching key.

    Also change .toJSON() usage in Mistral models to .toJSON({pretty: true})
    usage to not interfere with deserializing JSON blobs when we need to
    recreate a Barricade object from JSON blob.

    Provide a foundation of a suite of filters unit-tests - just a list of
    specs being verified with an actual code to be written later.

    Closes-Bug: #1436409
    Change-Id: I7af36abbdcfab70a6b867c39e49420d1716c1310