Leapp doesn't log "real errors" / tracebacks

[pirat89]

Actual behavior
If any actor crashes completely, leapp is not able to handle the issue nor log it (so without the console log it's not possible to see the error).

To Reproduce
Let's make any actor crash compltely and check leapp.db & /var/log/leapp/leapp-upgrade.log.
No info about the error is present inside.

Expected behavior
Crash of actor is processed by leapp and information is present in leapp.db & log files.

Addtitional info:

• leapp-0.12.0-100.202102180840Z.8e3280a.master.el7_9.noarch