This patch does three things:
1) It adds the extensible service which can be used to allow plugins
to customize various containers by adding and removing items such as
workflow steps, table actions, and form fields.
2) It adds support for a "feature" plugin that can be used to add
angular modules that can then be used to customize various panels.
The feature plugin is different from a typical plugin in that it does
not add a dashboard or panel, it only adds angular modules, JS files,
HTML templates, spec files, styles, etc.
3) It updates the workflow service to make each workflow extensible
and adds IDs to the launch instance workflow steps so that this
workflow instance is now extensible.
An example feature plugin is available here:
https://drive.google.com/open?id=0Bye7buoZvOxFOXJvMTNNUTdNNUk
Documentation will be provided by this commit:
https://review.openstack.org/244407
Implements: blueprint angular-workflow-plugin
Change-Id: I8b426b1644c26b1af063d570da19a75ac8c97c27
aa4d3e603d