social: guest_talk test; multicast: fix member_to_origin_resume()

git-svn-id: https://gnunet.org/svn/gnunet@34026 140774ce-b5e7-0310-ab8b-a85725594a96
multicast,psyc,social: remove DEBUG #defines from tests to keep `make check` working

git-svn-id: https://gnunet.org/svn/gnunet@34027 140774ce-b5e7-0310-ab8b-a85725594a96