[openstack|image] Added update_members function

lib/fog/openstack/image.rb

@@ -24,6 +24,7 @@ module Fog
       request :create_image
       request :update_image
       request :get_image_members
+      request :update_image_members
       request :get_shared_images
       request :add_member_to_image
       request :remove_member_from_image

lib/fog/openstack/models/image/image.rb

@@ -69,6 +69,11 @@ module Fog
           connection.remove_member_from_image(self.id, member_id)
         end
 
+        def update_members(members)
+          requires :id
+          connection.update_image_members(self.id, members)
+        end
+
         def members
           requires :id
           connection.get_image_members(self.id).body['members']

lib/fog/openstack/requests/image/update_image_members.rb

@@ -0,0 +1,37 @@
+module Fog
+  module Image
+    class OpenStack
+      class Real
+        def update_image_members(image_id, members)
+          # Sample members
+          # [
+          #   {'member_id' => 'tenant1', 'can_share' => true  },
+          #   {'member_id' => 'tenant2', 'can_share' => false }
+          # ]
+          data = { 'memberships' => members }
+
+          request(
+            :body    => MultiJson.encode(data),
+            :expects => [200, 202],
+            :method  => 'PUT',
+            :path    => "images/#{image_id}/members"
+          )
+        end
+      end # class Real
+
+      class Mock
+        def update_image_members(image_id, members)
+          response = Excon::Response.new
+          response.status = [200, 202][rand(1)]
+          response.body = {
+            'members' => [
+              { 'member_id'=>'ff528b20431645ebb5fa4b0a71ca002f', 'can_share' => false },
+              { 'member_id'=>'ff528b20431645ebb5fa4b0a71ca002f', 'can_share' => true  }
+            ]
+          }
+          response
+        end
+      end # class Mock
+    end # class OpenStack
+  end # module Identity
+end # module Fog