improving the debuggability during hudson-dev:run

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@17884 71c3de6d-444a-0410-be80-ed276b4c234a

war/pom.xml

@@ -153,6 +153,11 @@ THE SOFTWARE.
               <name>stapler.jelly.noCache</name>
               <value>true</value>
             </systemProperty>
+            <systemProperty>
+              <!-- show the stapler evaluation during execution -->
+              <name>stapler.trace</name>
+              <value>true</value>
+            </systemProperty>
             <systemProperty>
               <!-- load view resources from the source directly, again for real time change -->
               <name>stapler.resourcePath</name>