fix "re-test" path

releng.control/cc_config.xml

@@ -122,8 +122,9 @@
         </schedule>
     </project>
 
-    <!--
-        <property
+    <!-- skipCleanBuild causes the most recent build 
+         to be re-used to do the Unit Tests 
+    <property
         name="skipCleanBuild"
         value="yes" />
     -->
@@ -382,9 +383,6 @@
                 <property
                     name="build.pack-all-in-one"
                     value="true" />
-                <property
-                    name="skipCleanBuild"
-                    value="yes" />
             </ant>
         </schedule>
     </project>