Require SSL for database connections

[skondrashov]

We will eventually want to only allow SSL connections to our databases. This will first require SSL to be enabled through the cloud console simultaneously with uncommenting (and editing) some code in archivist's Consumer.php. We need to ensure archivist stays online when SSL is turned on, so this task requires particular care and will propagate directly to master.

Other changes will then need to be made in all files that make database connections, but those changes will not disrupt the archivist service.