THRIFT-2801: cpp - compilation warnings removed from test suite

Client: C++
Patch: Konrad Grochowski

Unused parameters mostly
diff --git a/lib/cpp/test/processor/ServerThread.h b/lib/cpp/test/processor/ServerThread.h
index 0dd5127..f7fa0d5 100644
--- a/lib/cpp/test/processor/ServerThread.h
+++ b/lib/cpp/test/processor/ServerThread.h
@@ -61,7 +61,7 @@
    * Subclasses may override this method if they wish to record the final
    * port that was used for the server.
    */
-  virtual void bindSuccessful(uint16_t port) {
+  virtual void bindSuccessful(uint16_t /*port*/) {
   }
 };