avoid maintaining a branch of org.eclipse.jdt.core.tests.builder by applying this tiny adaption using a team.
diff --git a/testplugins/org.eclipse.objectteams.otdt.test.builder/build.properties b/testplugins/org.eclipse.objectteams.otdt.test.builder/build.properties
index 60c266b..e761a5e 100644
--- a/testplugins/org.eclipse.objectteams.otdt.test.builder/build.properties
+++ b/testplugins/org.eclipse.objectteams.otdt.test.builder/build.properties
@@ -4,4 +4,5 @@
                test.xml,\

                JCL/,\

                workspace/,\

-               META-INF/

+               META-INF/,\

+               plugin.xml