-import java.lang.management.ManagementFactory;
-import java.net.InetSocketAddress;
-
-import javax.net.ssl.SSLContext;
-
+import com.google.common.base.Optional;
+import io.netty.channel.ChannelFuture;
+import io.netty.channel.EventLoopGroup;
+import io.netty.channel.nio.NioEventLoopGroup;
+import io.netty.util.HashedWheelTimer;
+import org.junit.After;
+import org.junit.Before;