B #5419: Protected info_all method does respond_to? in Ruby 1.9

(cherry picked from commit 861b292f16294a6f178666e66e67df2637e75464)

src/vmm_mad/remotes/lib/vcenter_driver/vi_helper.rb

@@ -34,9 +34,11 @@ class VIHelper
 
     def self.one_pool(the_class, exit_if_fail = true)
         item = the_class.new(client)
-        if item.respond_to?(:info_all)
+
+        rc = nil
+        begin
             rc = item.info_all
-        else
+        rescue
             rc = item.info
         end