Prepatory tidy-up
Start of work for Server config to be in config.groovy

HostVerifier uses values from config as well as the database (for now) to verify proxy requests
dos2unix on HostVerifier
getInfo call in ServerController

supports getting server information from config file
LayerStore: use server info to get layer type
tidy up layer store

remove redundant calls to spyOn publish
remove callback code in layerstore
Merge pull request #1448 from aodn/servers_from_config

Servers from config