add quick test for manifest attribute

tests/org.eclipse.wtp.releng.tests/src/org/eclipse/wtp/releng/tests/QuickTestManifests.java

@@ -16,9 +16,12 @@ import org.eclipse.osgi.util.ManifestElement;
 import org.osgi.framework.BundleException;
 
 /**
- * This simple utility was attached to bug
- * https://bugs.eclipse.org/bugs/show_bug.cgi?id=329376 and provides a simple
- * quick check on one form of incorrect headers.
+ * This simple utility was originally attached to bug 329376
+ * https://bugs.eclipse.org/bugs/show_bug.cgi?id=329376 
+ * and provides a simple
+ * quick check on one form of incorrect headers. We do not run this test
+ * routinely, just tested some "old" code to see if they had that form of
+ * incorrect manifest.
  */
 public class QuickTestManifests implements IApplication {
 
@@ -43,11 +46,16 @@ public class QuickTestManifests implements IApplication {
             if (child.isDirectory()) {
                 processFolder(child);
             }
+            // note, we check zip's probably only for orbit case? 
             else if (child.getName().endsWith(".jar") || child.getName().endsWith(".zip")) {
                 processJar(child);
             }
             else {
-                error("Skipping unexpected file type: " + child);
+                // these common cases clutter the log. But print out other unexpected file types, 
+                // to aide debugging or to spot invalid root directories
+                if (!(child.getName().endsWith(".jar.pack.gz") || child.getName().endsWith(".xml"))) {
+                    error("Skipping unexpected file type: " + child);
+                }
             }
         }
     }