Don't enforce the use of lb_method in upstream. (#199)

Author: pritpal-sabharwal

templates/http/default.conf.j2

@@ -3,7 +3,9 @@
 {% if item.value.upstreams is defined and item.value.upstreams %}
 {% for upstream in item.value.upstreams %}
 upstream {{ item.value.upstreams[upstream].name }} {
+{% if item.value.upstreams[upstream].lb_method is defined and item.value.upstreams[upstream].lb_method | length %}
     {{ item.value.upstreams[upstream].lb_method }};
+{% endif %}
 {% if item.value.upstreams[upstream].zone_name is defined and item.value.upstreams[upstream].zone_name %}
     zone {{ item.value.upstreams[upstream].zone_name }} {{ item.value.upstreams[upstream].zone_size }};
 {% endif %}