ovn-controller: Honor updates to SSL configuration while waiting for SB DB.

ovn-controller: Honor updates to SSL configuration while waiting for SB DB.

At startup time, ovn-controller connects to the OVS database and retrieves
a pointer to the southbound database, then connects to the southbound
database and retrieves a snapshot.  Until now, however, it didn't pay
attention to changes in the OVS database while trying to retrieve the
southbound database, which meant that if the SSL settings changed,
ovn-controller would continue to use the old ones, which probably wouldn't
work.

Also honor changes to the remote for the southbound database while waiting
to connect to it.

Most of the changes in this commit are whitespace only indentation changes,
so passing -w to "git show" (etc.) make it easier to understand.

Reported-by: Dan Williams <dcbw@redhat.com>
Reported-at: https://github.com/openvswitch/ovs-issues/issues/144
Signed-off-by: Ben Pfaff <blp@ovn.org>