Updates the java dockerfile and client command to reflect recent flag changes
diff --git a/tools/dockerfile/grpc_java/Dockerfile b/tools/dockerfile/grpc_java/Dockerfile
index c51ee1f..f234f51 100644
--- a/tools/dockerfile/grpc_java/Dockerfile
+++ b/tools/dockerfile/grpc_java/Dockerfile
@@ -10,4 +10,4 @@
   mvn install
 
 # Specify the default command such that the interop server runs on its known testing port
-CMD ["/var/local/git/grpc-java/run-test-server.sh", "--transport=HTTP2_NETTY_TLS", "--grpc_version=2", "--port=8030"]
+CMD ["/var/local/git/grpc-java/run-test-server.sh", "--use_tls=true", "--port=8030"]