Seems that $TMPDIR is not created automatically on the DAS4 slave nodes?
Also, cleanup fake $HOME after running.
Merge pull request #186 from whirm/fix_vnc_wrapper

Seems that $TMPDIR is not created automatically on the DAS4 slave nodes?
Create $TMPDIR only if the var is there.
Allow to not use a virtualenv on the remotes
by setting use_remote_venv to false.
Recreate output dir after deleting it.
So rsyncing from remotes works in the case where we don't create any
local output.
Add a no-swift version of the test runner so we can run it for the new
Tribler versions.
Merge pull request #188 from whirm/no-swift

No swift
Merge pull request #187 from egbertbouman/tunnel

Tunnel experiment