[fuel-dev-tools] rsync commands are failing

All rsync commands are failling due to recent changes to docker devicemapper.

Trackback:

~/mirantis/fuel-dev-tools/vagrant/sources/fuel-web(branch:extensions-api-handlers) » fuel-dev-tools --ip 172.18.163.4 -p 8162 nailgun-rsync [fuel]sylwester@Sylwesters-MacBook-Pro-11
Connected (version 2.0, client OpenSSH_6.6.1)
Authentication (publickey) successful!
rsync: mkdir "/var/lib/docker/devicemapper/mnt/bb4798c202a9f771d5b5b4876eff7393d2fa00e687d4a735aaf3675e953bc8d7/rootfs/usr/lib/python2.7/site-packages/nailgun" failed: No such file or directory (2)
rsync error: error in file IO (code 11) at main.c(587) [Receiver=3.0.9]
rsync: connection unexpectedly closed (8 bytes received so far) [sender]
rsync error: error in rsync protocol data stream (code 12) at /SourceCache/rsync/rsync-45/rsync/io.c(453) [sender=2.6.9]
Command '['rsync', '-avz', '--exclude=*.pyc', '--exclude=test', '-e', 'ssh -p 8162', './nailgun/nailgun/', 'root@172.18.163.4:/var/lib/docker/devicemapper/mnt/bb4798c202a9f771d5b5b4876eff7393d2fa00e687d4a735aaf3675e953bc8d7/rootfs/usr/lib/python2.7/site-packages/nailgun']' returned non-zero exit status 12

all mapped devices from /var/lib/docker/devicemapper/mnt/ are now empty. We should find a way to rsync files directly to the container or somehow add new docker volume with site-packages.