[324927] Do not serialize configurations that are contributed by Eclipse plug-ins.

Signed-off-by: Florian Thienel <florian@thienel.org>
diff --git a/sourceediting/tests/org.eclipse.wst.xml.vex.ui.tests/build.properties b/sourceediting/tests/org.eclipse.wst.xml.vex.ui.tests/build.properties
index aa1a008..8cc14a1 100644
--- a/sourceediting/tests/org.eclipse.wst.xml.vex.ui.tests/build.properties
+++ b/sourceediting/tests/org.eclipse.wst.xml.vex.ui.tests/build.properties
@@ -2,4 +2,6 @@
 output.. = bin/
 bin.includes = META-INF/,\
                .,\
-               plugin.properties
+               plugin.properties,\
+               plugin.xml,\
+               testdata/