- use awx-python in shebang in dev env
- scl enable where needed for rhel7 & container installs
- use scram-sha-256 pg user hashing by default
- ensure psycopg2 is using the correct PG_CONFIG at build time for the right libpq version
Daphne has a default timeout of 86400 seconds, so after 1 day of starting
awx_web container, the stdout stops refreshing automatically on the web UI.
This fixes this issue by making the timeout infinite, so the connection
between nginx and daphne's websocket never closes.