Comment 1 for bug 1994056

after reviewing some of the main openstack porjects (keystone, glance cinder placment)

only keystone currenlty porvides a way to configure the config files when running under mod_wsgi

there solution is to expose an envionment variabel to allow the opeartor to list the files to load.

https://github.com/openstack/keystone/blob/7d4047cb69139c22f4e321e9ba8b287a47168df2/keystone/server/flask/core.py#L74-L88

to keep concitnecy i will adopt the same appch defaulting the configs to the current set but adding a OS_NOVA_CONFIG_FILES atribute. i will also use ";" as the seperator insted of comma for consitency.