BUG #14315: Fix CS wrapping for modules added by plugins.

Modules added by plugins were being CS wrapped but they weren't being
initialized with the Plugin was loaded. This fixes that issue.

This also results in the following:

+ plugins no longer have to manually link to the modules they added, it's done
automatically.
+ plugins no longer have to use CS_KITS in the call to add_paraview_plugin() for
modules they added.

Change-Id: Ia187eb54ac40efe39e94b54fdeffd7a1c8fd0be2
Merge topic '14315_fix_plugin_cs_wrappings' into next

02509cf BUG #14315: Fix CS wrapping for modules added by plugins.