the field needs to be made accessible first.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@10778 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/maven/MavenEmbedder.java

@@ -736,6 +736,7 @@ public class MavenEmbedder
                 // for us. So we need to override this private field.
                 try {
                     Field field = settingsBuilder.getClass().getDeclaredField("globalSettingsFile");
+                    field.setAccessible(true);
                     // getAbsoluteFile is probably not necessary, but just following what DefaultMavenSettingsBuilder does
                     field.set(settingsBuilder,new File(mavenHome,"conf/settings.xml").getAbsoluteFile());
                 } catch (NoSuchFieldException e) {