protection service now uses groupName specified in protection params
added UserGroupRepository.findByGroupName, implementation, tests
introduced AccessDeniedException in import/export services
handle AccessDeniedException in form beans that support import/export
introduced EntityUtil and fixed bug in group member repository tests
UserGroupRepository.findByGroupName now handles self group properly
must pass login name when resolving owner to handle self group
fixed integration test broken by introduction of protection service
fixed integration tests broken by introduction of EntityUtil