Fix bug with logic being wrong way around

Author: bobtfish

lib/synapse/service_watcher/etcd.rb

@@ -133,8 +133,7 @@ def discover
           true
         end
       else
-        log.info "synapse: discovered #{new_backends.length} backends for service #{@name}"
-        if @backends == new_backends
+        if @backends != new_backends
           log.info "synapse: discovered #{new_backends.length} backends (including new) for service #{@name}"
           @backends = new_backends
           true