[ibm] Add a InstanceType model, returned as part of Images

lib/fog/ibm/models/compute/image.rb

@@ -1,4 +1,5 @@
 require 'fog/core/model'
+require 'fog/ibm/models/compute/instance-types'
 
 module Fog
   module Compute
@@ -21,6 +22,11 @@ module Fog
 
         attribute :volume_id
 
+        def initialize(new_attributes = {})
+          super(new_attributes)
+          attributes[:supported_instance_types] = Fog::Compute::IBM::InstanceTypes.new.load(attributes[:supported_instance_types]) if attributes[:supported_instance_types]
+        end
+
         def save
           requires :id, :volume_id
           data = connection.create_image(id, volume_id)

lib/fog/ibm/models/compute/instance-type.rb

@@ -0,0 +1,14 @@
+require 'fog/core/model'
+
+module Fog
+  module Compute
+    class IBM
+      class InstanceType < Fog::Model
+        identity :id
+        attribute :detail
+        attribute :label
+        attribute :price
+      end
+    end
+  end
+end

lib/fog/ibm/models/compute/instance-types.rb

@@ -0,0 +1,15 @@
+require 'fog/core/collection'
+require 'fog/ibm/models/compute/instance-type'
+
+module Fog
+  module Compute
+    class IBM
+
+      class InstanceTypes < Fog::Collection
+
+        model Fog::Compute::IBM::InstanceType
+
+      end
+    end
+  end
+end