Add pdb leftovers to .gitignore
Remove extra logging for empty tasks
Run post_mortem on errors if needed

To use this, add post_mortem=true in your PLUGINS conf.
Fix event_data for Server resource
Volume.display_name may be None
Fix PEP8 issue
Server in ERROR state does not require volumes
Merge remote-tracking branch 'origin/master' into configurable-vol-timeouts