Merge pull request #1535 from MITx/fix/cdodge/make-jump-to-handle-lost-slash

remove empty attempts and weights from simple test course

common/test/data/simple/course.xml

@@ -15,7 +15,7 @@
   <chapter name="Chapter 2">
     <section name="Problem Set 1">
       <sequential>
-        <problem type="lecture" showanswer="attempted" rerandomize="true" display_name="A simple coding problem" name="Simple coding problem" filename="ps01-simple" url_name="ps01-simple" weight="" attempts=""/>
+        <problem type="lecture" showanswer="attempted" rerandomize="true" display_name="A simple coding problem" name="Simple coding problem" filename="ps01-simple" url_name="ps01-simple"/>
       </sequential>
     </section>
     <video name="Lost Video" youtube="1.0:TBvX7HzxexQ"/>