Security fix: anonymous script execution

Fixed major security problem:

* execution of any groovy script with anonymous access on publish CQ instances
* execution of any groovy script with non-administrative privileges on author CQ instances
* added "not sufficient privileges" response message for POST groovyconsole servlet
added security check.
version.
updated to use request session and resource resolver.
Merge branch 'hotfix-3.0.2'

Conflicts:
	pom.xml
	src/main/content/jcr_root/apps/groovyconsole/components/console/POST.groovy