First pass at removing cached DOM tree code from EntityConfigUtil.java. I converted some of the code to use the new thread-safe models. I also fixed some concurrency problems in related classes by replacing DCL with java.util.concurrent classes. I discovered the new multi-threaded component loader was creating duplicate resources, so these changes fix that.


git-svn-id: https://svn.apache.org/repos/asf/ofbiz/trunk@1490541 13f79535-47bb-0310-9956-ffa450edef68