[compute|aws] add modify_image_attribute

lib/fog/compute/aws.rb

@@ -71,6 +71,7 @@ module Fog
       request :get_password_data
       request :import_key_pair
       request :modify_image_attribute
+      request :modify_instance_attribute
       request :modify_snapshot_attribute
       request :purchase_reserved_instances_offering
       request :reboot_instances

lib/fog/compute/requests/aws/modify_instance_attribute.rb

@@ -0,0 +1,37 @@
+module Fog
+  module Compute
+    class AWS
+      class Real
+
+        require 'fog/compute/parsers/aws/basic'
+
+        # Modify instance attributes
+        #
+        # ==== Parameters
+        # * image_id<~String> - Id of machine image to modify
+        # * attributes<~Hash>:
+        #   'InstanceType.Value'<~String> - New instance type
+        #   'Kernel.Value'<~String> - New kernel value
+        #   'Ramdisk.Value'<~String> - New ramdisk value
+        #   'UserData.Value'<~String> - New userdata value
+        #   'DisableApiTermination.Value'<~Boolean> - Change api termination value
+        #   'InstanceInitiatedShutdownBehavior.Value'<~String> - New instance initiated shutdown behaviour, in ['stop', 'terminate']
+        #   'SourceDestCheck.Value'<~Boolean> - New sourcedestcheck value
+        #   'GroupId'<~Array> - One or more groups to add instance to (VPC only)
+        #
+        # {Amazon API Reference}[http://docs.amazonwebservices.com/AWSEC2/latest/APIReference/ApiReference-query-ModifyInstanceAttribute.html]
+        #
+        def modify_instance_attributes(image_id, attributes)
+          params = {}
+          params.merge!(Fog::AWS.indexed_param('GroupId', attributes['GroupId'] || []))
+          request({
+            'Action'        => 'ModifyInstanceAttribute',
+            :idempotent     => true,
+            :parser         => Fog::Parsers::Compute::AWS::Basic.new
+          }.merge!(params))
+        end
+
+      end
+    end
+  end
+end