Set workspace_root relative to bonny home directory
Set workspace_root relative to bonny home directory

workspace_root seems to be a folder on the worker node. If it's set to
/var/lib/* then the bonnyci user can't create it and the job will fail.
Set it relative to home so that the setup task can work.

SpamapS/hoist,BonnyCI/hoist,jamielennox/hoist,jamielennox/hoist,SpamapS/hoist,BonnyCI/hoist