support dockerd and docker daemon in unit files#704

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grantholly wants to merge 2 commits intogarethr:masterfrom

grantholly:master

Commits on Jul 3, 2017

adding a fact to find if the dockerd binary exists to avoid an issue where systemd cannot start contemporary versions of docker with the docker unit file because it calls out the now deprecated `do…
grantholly
committed

Commits on Jul 5, 2017

creating a unit test for the dockerd_binary fact
grantholly
committed