Merge pull request #19 from mbiarnes/newEnforcerRule1.7.1

drools-wb screens adpated to illegal transitive dependency check
Refactor to remove Plexus dependency following: https://github.com/droolsjbpm/drools-wb/pull/19
ZIP service
adapted drools-wb-jcr2vfs-migration and drools-wb-webapp to illegal transitive dependency check