Revert "Require libotr 4.0.0 instead of the version it was compiled with"

This reverts commit 09a04ac975270a7433943b4113cbb220d4d16ed8.

It got rejected upstream (this is not our problem), and tbh I agree.
msn: update ABService ApplicationId to WLM 2012 to fix login

The previous ApplicationId was from WLM 2008 (8.5)