Env var WIP.

Fix publish hooks for mongo, postgres; remove unnecessary hooks; fix python, php manifests.

Fix manifests for remaining carts.

Fix v1 args.

Add code to convert args.

Load env vars from sub directories.

Add oo_unsubscribe to mcol agent.

Fixes.

Fixes.
Merge pull request #2280 from mrunalp/dev/auto_env_vars

Merged by openshift-bot