use functional-test plugin version 2.0.0
update hibernate and hibernate4 plugin versions to latest
Merge branch '2.3.x'

Conflicts:
	apps/errors/grails-app/conf/BuildConfig.groovy
	apps/html-default-codec/grails-app/conf/BuildConfig.groovy
	apps/kitchen_sink_app/grails-app/conf/BuildConfig.groovy
	apps/modify-beans/grails-app/conf/BuildConfig.groovy
	apps/spring/grails-app/conf/BuildConfig.groovy
	apps/tag-libraries/grails-app/conf/BuildConfig.groovy
	apps/test-plugins/grails-app/conf/BuildConfig.groovy