Do not delete properties when create image from URL

Set purge_props=False to ensure we do not delete properties that
we have set on the image.

Change-Id: I4d8a9b8b20ef946e86389c59e79e874f078e1db3
Closes-Bug: #1325787
Display cinder services in System Info

This change includes cinder services in the system info
panel so that users can check which are the cinder services
and their status

Implements: blueprint cinder-service-list
Co-Authored-By: Leandro Costantino <leandro.i.costantino@intel.com>
Change-Id: Ic3594621ff956ef5aa76fb6617b5339f56015248
Fix issue when Nova does not support DiskConfig

When DiskConfig is not support by Nova, the disk_config field is
removed from the form. This fix takes care of safely handling the
case when the field is not available.

Change-Id: I44727eb3fc44c209b3b8cf28ab89a45c7d3bcfa1
Closes-Bug: #1326406
Merge "Display cinder services in System Info"
Merge "Fix issue when Nova does not support DiskConfig"
Merge "Do not delete properties when create image from URL"