[SPARK-17379][BUILD] Upgrade netty-all to 4.0.41 final for bug fixes

## What changes were proposed in this pull request?
Upgrade netty-all to latest in the 4.0.x line which is 4.0.41, mentions several bug fixes and performance improvements we may find useful, see netty.io/news/2016/08/29/4-0-41-Final-4-1-5-Final.html. Initially tried to use 4.1.5 but noticed it's not backwards compatible.

## How was this patch tested?
Existing unit tests against branch-1.6 and branch-2.0 using IBM Java 8 on Intel, Power and Z architectures

Author: Adam Roberts <aroberts@uk.ibm.com>

Closes #14961 from a-roberts/netty.

common/network-common/src/main/java/org/apache/spark/network/util/TransportConf.java

@@ -23,6 +23,11 @@ import com.google.common.primitives.Ints;
  * A central location that tracks all the settings we expose to users.
  */
 public class TransportConf {
+  
+  static {
+    // Set this due to Netty PR #5661 for Netty 4.0.37+ to work
+    System.setProperty("io.netty.maxDirectMemory", "0");
+  }
 
   private final String SPARK_NETWORK_IO_MODE_KEY;
   private final String SPARK_NETWORK_IO_PREFERDIRECTBUFS_KEY;

dev/deps/spark-deps-hadoop-2.2

@@ -124,7 +124,7 @@ metrics-json-3.1.2.jar
 metrics-jvm-3.1.2.jar
 minlog-1.3.0.jar
 netty-3.8.0.Final.jar
-netty-all-4.0.29.Final.jar
+netty-all-4.0.41.Final.jar
 objenesis-2.1.jar
 opencsv-2.3.jar
 oro-2.0.8.jar

dev/deps/spark-deps-hadoop-2.3

@@ -131,7 +131,7 @@ metrics-jvm-3.1.2.jar
 minlog-1.3.0.jar
 mx4j-3.0.2.jar
 netty-3.8.0.Final.jar
-netty-all-4.0.29.Final.jar
+netty-all-4.0.41.Final.jar
 objenesis-2.1.jar
 opencsv-2.3.jar
 oro-2.0.8.jar

dev/deps/spark-deps-hadoop-2.4

@@ -131,7 +131,7 @@ metrics-jvm-3.1.2.jar
 minlog-1.3.0.jar
 mx4j-3.0.2.jar
 netty-3.8.0.Final.jar
-netty-all-4.0.29.Final.jar
+netty-all-4.0.41.Final.jar
 objenesis-2.1.jar
 opencsv-2.3.jar
 oro-2.0.8.jar

dev/deps/spark-deps-hadoop-2.6

@@ -139,7 +139,7 @@ metrics-jvm-3.1.2.jar
 minlog-1.3.0.jar
 mx4j-3.0.2.jar
 netty-3.8.0.Final.jar
-netty-all-4.0.29.Final.jar
+netty-all-4.0.41.Final.jar
 objenesis-2.1.jar
 opencsv-2.3.jar
 oro-2.0.8.jar

dev/deps/spark-deps-hadoop-2.7

@@ -140,7 +140,7 @@ metrics-jvm-3.1.2.jar
 minlog-1.3.0.jar
 mx4j-3.0.2.jar
 netty-3.8.0.Final.jar
-netty-all-4.0.29.Final.jar
+netty-all-4.0.41.Final.jar
 objenesis-2.1.jar
 opencsv-2.3.jar
 oro-2.0.8.jar

pom.xml

@@ -551,7 +551,7 @@
       <dependency>
         <groupId>io.netty</groupId>
         <artifactId>netty-all</artifactId>
-        <version>4.0.29.Final</version>
+        <version>4.0.41.Final</version>
       </dependency>
       <dependency>
         <groupId>io.netty</groupId>