Some streams may stuck in "broadcasting" state

[mekya]

Steps to reproduce

1. Publish a WebRTC stream - stream1
2. Terminate AMS immediately with kill -9
3. Make sure "stream1" is not trying to reconnect
4. Start AMS again

Expected behavior

Stream having id "stream1" should be offline. Number of actlive streams on the web panel should be 0

Actual behavior

Stream having id "stream1" seems in "broadcasting". Number of active streams on the web panel is 1