The metadata will be used to get list of enabled applications
that implement formula based upgrades.

Change-Id: Ibc368d993aa1c3c8715598513467da78792c752b

This reverts commit a84007cf9e.

Change-Id: I547d741da0699abe3e645a0b767d55d5d53e0dbb

This reverts commit 0cd19b9ea1.

Change-Id: Iea9bc493c246d2c4fdee48d58883d21a10ebf054

The patch adds _orchestrate.conf file to salt minion
configuration. Its template searches for "/meta/salt.yml"
file across all installed formulas and parses them if found.
As of now config will contain following data, e.g.:
orchestration:
  deploy:
    applications:
      cinder:
        priority: 150
      keystone:
        priority: 100

Application priorities will be used later for salt deploy
orchestration

Change-Id: I56b0d15e5a13ca4975d98b9675991f84885120e6
Related-PROD: PROD-19973