Fixes "Pagination at find WorkEffort screen does not work" https://issues.apache.org/jira/browse/OFBIZ-5629

I simply reused listIt in removeDuplicateWorkEfforts service which is called after performFind in ListWorkEfforts (itself extended by FoundWorkEfforts)

git-svn-id: https://svn.apache.org/repos/asf/ofbiz/trunk@1592530 13f79535-47bb-0310-9956-ffa450edef68