sc2soda: remove hard-coded resourceID for other services

[pdowler]

Several services (sc2links, sc2meta, sc2soda) have hard coded dependencies on other sc2 services via ServiceConfig.properties file inside the war file. Instead, such config should be found in ~/config/{service}.properties at startup, for example:

sc2soda.properties with something like:

ca.nrc.cadc.sc2links.tapService = ivo://cadc.nrc.ca/sc2tap
ca.nrc.cadc.sc2links.sodaService = ivo://cadc.nrc.ca/sc2soda

Good practice: parse config in an InitAction and store stuff in JNDI