Add temp directory mask for codejail.

playbooks/roles/edxapp/templates/code.sandbox.j2

@@ -25,5 +25,8 @@
     # Allow access to selections from /proc
     #
     /proc/*/mounts r,
+    
+    /tmp/codejail-*/ rix,
+    /tmp/codejail-*/** wrix,
 
 }