Fix redirect syntax for upstart template.

consul was not logging on Ubuntu due to incorrect
redirect syntax in the upstart script.
Fixes #182

templates/consul.conf.j2

@@ -20,7 +20,7 @@ script
 
   # Set GOMAXPROCS to use all our CPUs, because Consul can block a scheduler thread
   # Use su to become consul user non-interactively on old Upstart versions (see http://superuser.com/a/234541/76168)
-  exec su -s /bin/sh -c 'GOMAXPROCS=`nproc` exec "$0" "$@" &>>{{ consul_log_file }}' consul -- /opt/consul/bin/consul agent \
+  exec su -s /bin/sh -c 'GOMAXPROCS=`nproc` exec "$0" "$@" 1>> {{ consul_log_file }} &2>1' consul -- /opt/consul/bin/consul agent \
 {% if consul_dynamic_bind %}
     -bind=$BIND \
 {% endif %}