/server/:id/view UI route spawns a large amount of sequential queries. Consolidate these queries.

https://github.com/apache/incubator-trafficcontrol/blob/master/traffic_ops/app/lib/UI/Server.pm#L57

^^ this code cause a large amount of sequential queries that does not work well with a TO --> remote Postgres setup.

There is no need to fetch the additional information needed (xml_id) in this manner. Use a dbix prefetch on the original query instead.