Remove everything from VMDB::Config that doesn't belong there.

@jrafanie Please review.  I recommend reviewing commit by commit.  Each commit is an isolated change.  All of this work is prep work for doing the configuration revamp.  There was SO MUCH stuff in my way that I couldn't see the forest for the trees.  This makes it A LOT clearer what the VMDB::Config is really about.
Should we also delete the log_network_address setting in vmdb.tmpl.yml?