[D-15] Fedora 19 installs Docker 0.8.1, does not have the -G or -e flag

[tduffield]

Currently, chef-docker on Fedora 19 installs Docker 0.8.1 which does not support the -G or -e flag, both of which were added in Docker 0.9.

Potential solutions:

• logic check to determine whether flags should be present
• install from source/binary if Fedora 19 is detected

[tduffield]

Decided that solution 1 made more sense.

[bflad]

@tduffield what's our threshold for backwards compatibility? I've been writing most functionality here with the assumption that we'll keep adding functionality until Docker 1.0 is cut. Although I do see the point that both of those are set with default values so it tries to add the flags. We could set almost all attributes to nil so they won't try to be set by default. Let me do some analysis today.

[bflad]

Defaulted both exec_driver and group to nil since it makes sense and protected group recipe from the change. Added note to README about LXC before Docker 0.9.0, although maybe we could explicitly include_recipe 'lxc' for platform fedora and platform_version 19? Also of note, FC19 docker-io 0.9.1 package does exist: http://koji.fedoraproject.org/koji/buildinfo?buildID=507488