These environment variables are now required.  Previously, the
corresponding Django settings would default to 'gracedb'.

Thomas Downes authored 6 years ago and Tanner Prestegard committed 6 years ago

ENABLE_SHIBD environment variable is set to "true" (default="false")

Containerized versions of the service will now get their LVAlert
credentials from the environment.  Also add a script for
processing environment variables and starting LVAlert overseer.

Settings have been reorganized and how different parameters are
determined has been reworked to be compatible with both a Puppet-based
VM deployment and a containerized deployment

Also removes need for pylal, which is no longer available.