update version to 2.3.6
update to datastore 3.0.0 release
fix for GRAILS-11117 "Incorrect status code for read-only REST controller"
test binding strings to a typed list of non domain objects
Merge branch '2.3.x'

Conflicts:
	build.gradle
	build.properties
	grails-test-suite-uber/src/test/groovy/grails/util/GrailsUtilTests.java