Fixed tests

Author: ValentinZakharov

dd-java-agent/instrumentation/netty-4.0/src/test/groovy/Netty40ServerTest.groovy

@@ -26,7 +26,6 @@ import io.netty.handler.codec.http.HttpRequest
 import io.netty.handler.codec.http.HttpRequestDecoder
 import io.netty.handler.codec.http.HttpResponseEncoder
 import io.netty.handler.codec.http.HttpResponseStatus
-import io.netty.handler.codec.http.HttpServerCodec
 import io.netty.handler.codec.http.websocketx.BinaryWebSocketFrame
 import io.netty.handler.codec.http.websocketx.CloseWebSocketFrame
 import io.netty.handler.codec.http.websocketx.ContinuationWebSocketFrame

dd-java-agent/testing/src/main/groovy/datadog/trace/agent/test/base/NettyWebsocketClient.groovy

@@ -99,7 +99,7 @@ class NettyWebsocketClient implements WebsocketClient {
 
   byte[][] split(byte[] src) {
     if (chunkSize <= 0) {
-      new byte[][]{src}
+      return new byte[][]{src}
     }
     def ret = new byte[(int) Math.ceil(src.length / chunkSize)][]
     def offset = 0