Fixed unit test which relied on ClientData being non-final for mocking

Author: dgant

src/main/java/bwapi/ClientData.java

@@ -1,6 +1,6 @@
 package bwapi;
 import java.nio.ByteBuffer;
-final class ClientData {
+class ClientData {
     private WrappedBuffer buffer;
     private GameData gameData;
     ClientData() {

src/test/java/DumpToClient.java

@@ -91,7 +91,7 @@ public static void main(String[] args) throws IOException {
         try (PrintWriter out = new PrintWriter(sw)) {
             out.println("package bwapi;");
             out.println("import java.nio.ByteBuffer;");
-            out.println("final class ClientData {");
+            out.println("class ClientData {");
             out.println("    private WrappedBuffer buffer;");
             out.println("    private GameData gameData;");
             out.println("    ClientData() {");