Change get_server_version() to be more error proof

[gluemaker]

• don't get info.json anymore on init
• try to get current user info, and see if server version in that, if so use that.
• if not, just return unknown.

only admin's get server version returned in SOAP response? only admin's get access to info.json?

Needs full testing.

Should also get rid of force server version? We're not relying on server version for anything anymore.