MucCapsCache: Add query for anonymity

This adds a query to determine whether a MUC is semi-anonymous or
non-anonymous.
3 jobs for caps-cache-anonymity in 3 minutes and 57 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #11416
run-appdata

00:00:07

passed #11415
run-tests

00:03:34

 
  Build
passed #11417
run-build

00:00:14