Update calls to DyeColor getData and getByData. Addresses BUKKIT-2786

These two methods are now deprecated and replaced by the strictly
equivalent calls using wool data.

src/main/java/org/bukkit/craftbukkit/entity/CraftWolf.java

@@ -30,10 +30,10 @@ public class CraftWolf extends CraftTameableAnimal implements Wolf {
     }
 
     public DyeColor getCollarColor() {
-        return DyeColor.getByData((byte) getHandle().getCollarColor());
+        return DyeColor.getByWoolData((byte) getHandle().getCollarColor());
     }
 
     public void setCollarColor(DyeColor color) {
-        getHandle().setCollarColor(color.getData());
+        getHandle().setCollarColor(color.getWoolData());
     }
 }