Use netty optimizations in HTTP server handler benchmark

Author: vietj

vertx-core/src/test/java/io/vertx/benchmarks/HttpServerHandlerBenchmark.java

@@ -347,7 +347,9 @@ public Object vertxOpt() {
     "-Dvertx.threadChecks=false",
     "-Dvertx.disableContextTimings=true",
     "-Dvertx.disableHttpHeadersValidation=true",
-    "-Dvertx.disableMetrics=false"
+    "-Dvertx.disableMetrics=false",
+    "-Dio.netty.buffer.checkAccessible=false",
+    "-Dio.netty.buffer.checkBounds=false"
   })
   @Benchmark
   public Object vertxOptMetricsOn() {