Add ScaleDefaultHealth and subclass update rules

OpenRA.Mods.Common/UpdateRules/Rules/ScaleModHealthBy100.cs

@@ -0,0 +1,24 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2018 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System.Collections.Generic;
+
+namespace OpenRA.Mods.Common.UpdateRules.Rules
+{
+	public class ScaleModHealthBy100 : ScaleModHealth
+	{
+		public override IEnumerable<string> BeforeUpdate(ModData modData)
+		{
+			scale = 100;
+			return base.BeforeUpdate(modData);
+		}
+	}
+}