Install Optional AUFS filesystem support
Install Optional AUFS filesystem support

If we don't install this package, then the default Storage Driver
is devicemapper. There are reports of devicemapper issues on the
docker github project, example:
https://github.com/docker/docker/issues/9865

So let's try to switch to AUFS to see if docker performs better.

Change-Id: I2200f6f9cf80ced9514b22586924cb11e33ee2c2

gwdg/nova-docker,MinmingQian/nova-docker,Ye-Yong-Chi/nova-docker,thanhtien522/nova-docker,devdattakulkarni/nova-docker-1,mangalaman93/nova-docker,cloudbase/nova-docker,stackforge/nova-docker,cloudbase/nova-docker,Juniper/nova-docker,MinmingQian/nova-docker,gwdg/nova-docker,godvmxi/nova-docker,mangalaman93/nova-docker,Ye-Yong-Chi/nova-docker,msrba/nova-docker,stackforge/nova-docker,godvmxi/nova-docker,ggiamarchi/nova-docker,msrba/nova-docker,AlphaStaxLLC/nova-docker,thanhtien522/nova-docker,ggiamarchi/nova-docker,Juniper/nova-docker,devdattakulkarni/nova-docker-1,AlphaStaxLLC/nova-docker