Added flush AuthToken cache API.

CASA-auth-token/client/library/test/windows/main.cpp

@@ -167,6 +167,10 @@ int main(int argc, char* argv[])
             printf("Press 'Enter' to run test or 'n + Enter' to stop.\n");
          }
 
+		 // Cleanup the AuthToken cache to start clean the next time that
+		 // we run the test application.
+		 CleanUpAuthTokenCache();
+
          // Close winsock
          WSACleanup();
       }