WCM-34 Copy basic integration test infrastructure from 6.2
WCM-34 Remove unused methods and resolve dependencies
WCM-34 Replace TestUtil
WCM-34 Add Export/Import test infrastructure
WCM-34 Update module settings
WCM-34 Resolve dependencies with portal-impl.

This change requires to expose the com.liferay.portal.lar package through the system-packages-extra module.
WCM-34 Add integration test for export import in Audience Targeting
WCM-34 Export/Import deletions
WCM-34 Regen