0.2.3-alpha: LIBILS-966. Split Janeway autorun script.

Split off the initialization portion of the 'autorun' script into
a seperate script called initialize-janeway.sh. The Dockerimage
by default still runs autorun.sh, which calls this script, but
this allows Kubernetes InitContainers to initialize Janeway
without starting Janeway.

In Kubernetes, the application containers will just run gunicorn
directly.

https://umd-dit.atlassian.net/browse/LIBILS-966