Merge pull request #1811 from edx/feanil/codejail_option

Add a new param for codejail proxy but default it to off.

playbooks/roles/edxapp/defaults/main.yml

@@ -325,6 +325,7 @@ EDXAPP_CODE_JAIL_LIMITS:
   # Needs to be non-zero so that jailed code can use it as their temp directory.(1MiB in bytes)
   FSIZE: 1048576
   CPU: 1
+  PROXY: 0
 
 EDXAPP_VIRTUAL_UNIVERSITIES: []
 EDXAPP_SUBDOMAIN_BRANDING: {}