docker: fix volume[s]_from typo

Code makes reference to volume_from instead of volumes_from. If volumes_from is
passed as an argument, generates a KeyError.
Merge pull request #571 from lorin/volumes-from

docker: fix volume[s]_from typo
handle list of list for python-apt < 0.7.9 compatibility
older python-apt compatibility
improve fail message and use itertools chain
mark as upgradable and let apt-get install deal with it