[JENKINS-53322] Pre-work for removing dom4j fork. (jenkinsci#4089)

Changes to enable Jenkins to use either the standard, current dom4j release or the Jenkins-custom fork. This allows us to separately remove the fork and reference the standard one.

licenseCompleter.groovy

@@ -48,7 +48,7 @@ complete {
         rewriteLicense([], license("BSD License","http://jaxen.codehaus.org/license.html"))
     }
 
-    match("*:dom4j") {
+    match("org.jenkins-ci.dom4j:dom4j") {
         rewriteLicense([],license("BSD License","http://dom4j.sourceforge.net/dom4j-1.6.1/license.html"))
     }
 

test/src/test/java/hudson/bugs/JnlpAccessWithSecuredHudsonTest.java

@@ -95,8 +95,8 @@ public void anonymousCanAlwaysLoadJARs() throws Exception {
         XmlPage jnlp = (XmlPage) wc.goTo("computer/test/slave-agent.jnlp","application/x-java-jnlp-file");
         URL baseUrl = jnlp.getUrl();
         Document dom = new DOMReader().read(jnlp.getXmlDocument());
-        for( Element jar : (List<Element>)dom.selectNodes("//jar") ) {
-            URL url = new URL(baseUrl,jar.attributeValue("href"));
+        for( Object jar : dom.selectNodes("//jar") ) {
+            URL url = new URL(baseUrl,((org.dom4j.Element)jar).attributeValue("href"));
             System.out.println(url);
 
             // now make sure that these URLs are unprotected