@ teracyhq#277 | add primary config implementation for node

Vagrantfile

@@ -47,7 +47,7 @@ end
 Vagrant.configure("2") do |config|
   settings["nodes"].each do |node_config|
     $logger.debug("node_config: #{node_config}")
-    config.vm.define node_config["name"] do |node|
+    config.vm.define node_config["name"], primary: node_config["primary"] ||= false do |node|
       # node settings here
     end
   end