Merge pull request #878 from c4milo/patch-1

Upstart: Consul leave now works as expected.

terraform/aws/scripts/upstart.conf

@@ -4,6 +4,8 @@ start on runlevel [2345]
 stop on runlevel [!2345]
 
 respawn
+# This is to avoid Upstart re-spawning the process upon `consul leave`
+normal exit 0 INT
 
 script
   if [ -f "/etc/service/consul" ]; then