Use entry points for config generation

This starts using entry points to generate configuration for the
common.config and the common.wsgi modules, as they use entries with the
same name in different groups.
This also removes configuration for sslutils which is unused, and
re-enable the check for up-to-date configuration.

Co-Authored-By: ala.rezmerita@cloudwatt.com
Closes-Bug: #1288586
Change-Id: If48c62bbb2b1fb641791dad56f7f905e483080fa
Adding error message for output description

All caught exceptions should be displayed in output section.

Change-Id: I217bb52e33c3f0d20c3d01e75326687cc713d90a
Related-Bug: #1273490
Fix physical_resource_name for Nova server

This patch fixes the problem caused by the overridden
physical_resource_name() in OS::Nova::Server resource.  If the name
assigned to the Server resource is used for Keystone user creation,
there is a higher possibility of name conflicts.

Change-Id: I5eff496aef8949db9c1f9865e8de33d2b58c7a7f
Closes-Bug: #1324499
Merge "Use entry points for config generation"
Merge "Adding error message for output description"
Merge "Fix physical_resource_name for Nova server"