Add implementation for #delete_image service.

lib/fog/compute/requests/hp/delete_image.rb

@@ -0,0 +1,45 @@
+module Fog
+  module HP
+    class Compute
+      class Real
+
+        # Delete an image
+        #
+        # ==== Parameters
+        # * image_id<~Integer> - Id of image to delete
+        #
+        def delete_image(image_id)
+          request(
+            :expects  => 204,
+            :method   => 'DELETE',
+            :path     => "images/#{image_id}"
+          )
+        end
+
+      end
+
+      class Mock
+
+        def delete_image(image_id)
+          response = Excon::Response.new
+          if image = list_images_detail.body['images'].detect {|_| _['id'] == image_id}
+            if image['status'] == 'SAVING'
+              response.status = 409
+              raise(Excon::Errors.status_error({:expects => 202}, response))
+            else
+              self.data[:last_modified][:images].delete(image_id)
+              self.data[:images].delete(image_id)
+              response.status = 202
+            end
+            response
+          else
+            response.status = 400
+            raise(Excon::Errors.status_error({:expects => 202}, response))
+          end
+
+        end
+
+      end
+    end
+  end
+end