Conduit cannot shutdown gracefully with open inspector sessions

[hariso]

Bug description

#718 (comment)

Steps to reproduce

1. Start Conduit with a pipeline
2. Inspect a connector
3. Shut down Conduit gracefully (e.g. Ctrl+C or kill -2)

Expected behavior:
Conduit is shut down.

Actual behavior:
Conduit is not shut down.

Version

TBD