add list_opts to all modules with configuration options

this allows these modules to be exposed as entry points, and consumed by
oslo-config-generator.

Co-Authored-By: Dolph Mathews <dolph.mathews@gmail.com>
Co-Authored-By: Ben Nemec <bnemec@redhat.com>
Change-Id: I7f0ed83cc87a9647c341641134cefbb966d23bee
Closes-Bug: 1356438
Merge "add list_opts to all modules with configuration options"