update ruby azure to version 0.6.4

lib/vagrant-azure/action/run_instance.rb

@@ -91,9 +91,11 @@ module VagrantPlugins
           end
           env[:ui].info("Add Role? - #{add_role}")
 
-          server = env[:azure_vm_service].create_virtual_machine(
-            params, options, add_role
-          )
+          if add_role
+            env[:azure_vm_service].add_role(params.clone.merge(cloud_service_name: config.cloud_service_name), options)
+          else
+            env[:azure_vm_service].create_virtual_machine(params, options)
+          end
 
           if server.nil?
             raise Errors::CreateVMFailure

vagrant-azure.gemspec

@@ -48,7 +48,7 @@ Gem::Specification.new do |s|
   s.files         = unignored_files
   s.executables   = unignored_files.map { |f| f[/^bin\/(.*)/, 1] }.compact
 
-  s.add_runtime_dependency "azure", "0.6.3"
+  s.add_runtime_dependency "azure", "0.6.4"
 
   s.add_development_dependency "bundler", "~> 1.3"
   s.add_development_dependency "rake"