Merge pull request #272 from mattkirby/pooler_40

(POOLER-40) Do not return folders with get_pool_vms

lib/vmpooler/providers/vsphere.rb

@@ -51,7 +51,7 @@ module Vmpooler
             return vms if folder_object.nil?
 
             folder_object.childEntity.each do |vm|
-              vms << { 'name' => vm.name }
+              vms << { 'name' => vm.name } if vm.is_a? RbVmomi::VIM::VirtualMachine
             end
           end
           vms