clearing maven warnings in plugins - duplicated jruby-maven-plugin in core and missing managed version

Conflicts:
	pom.xml
whitespace
javax.xml.bind.api isn't necessary for cache module
Be better about excluding unneeded transitive dependencies
Synchronized access to ResourceCache#unload (TORQUE-1099)
Don't serve cached pages for POST requests (TORQUE-1105)
Properly handle JMS destinations started outside of TB/IMM [IMMUTANT-289]