Use a jinja map for canonical directories

Summary:
We provide directories variables as a jinja map to simplify
the state syntax.

This reverts commit 6f514b4bfb7b48a9f211723de27880866fca5dcc.
It contained the same logic as a pillar, not currently in use
(it was a preparatory work for unmerged D924).

Test Plan: Apply each affected SLS, assert it's no-op

Reviewers: dereckson

Reviewed By: dereckson

Subscribers: Sandlayth

Differential Revision: https://devcentral.nasqueron.org/D962