OPENEJB-2099 support validation.xml

git-svn-id: https://svn.apache.org/repos/asf/tomee/tomee/trunk@1614455 13f79535-47bb-0310-9956-ffa450edef68
for testng we need the right classloader before TestEvents so pushing it as we can

git-svn-id: https://svn.apache.org/repos/asf/tomee/tomee/trunk@1614464 13f79535-47bb-0310-9956-ffa450edef68