GitLab connections are duplicated on reconfiguration

...sometimes. Not precisely figured out why it thinks there are two, but there is only one on restart.

No file, test, or entry point is named. Start by reproducing GitLab connection reconfiguration followed by a restart, then trace the connection lifecycle to determine why a duplicate is detected. Done means reconfiguring and restarting with one GitLab connection no longer reports or creates two.

Written by the indexing model from the issue text.