Add Docker role to the highstate

Summary:
Equatower has been fully provisionned through Salt,
and those units are now ready to be used together.

This change provide the logic order to run the needed
units to provision a server with the paas-docker role.

Test Plan: Tested on Equatower

Reviewers: dereckson

Reviewed By: dereckson

Differential Revision: http://devcentral.nasqueron.org/D1750