Update io.netty from 4.0.13 Final to 4.0.17.Final

This update contains a lot of bug fixes and some new perf improvements.
It is also binary compatible with the current 4.0.13.Final

For more information: http://netty.io/news/2014/02/25/4-0-17-Final.html

Author: Binh Nguyen <ngbinh@gmail.com>

Author: Binh Nguyen <ngbinh@gmail.com>

Closes #41 from ngbinh/master and squashes the following commits:

a9498f4 [Binh Nguyen] update io.netty to 4.0.17.Final

pom.xml

@@ -298,7 +298,7 @@
       <dependency>
         <groupId>io.netty</groupId>
         <artifactId>netty-all</artifactId>
-        <version>4.0.13.Final</version>
+        <version>4.0.17.Final</version>
       </dependency>
       <dependency>
         <groupId>org.apache.derby</groupId>

project/SparkBuild.scala

@@ -214,7 +214,7 @@ object SparkBuild extends Build {
     */
 
     libraryDependencies ++= Seq(
-        "io.netty"          % "netty-all"       % "4.0.13.Final",
+        "io.netty"          % "netty-all"       % "4.0.17.Final",
         "org.eclipse.jetty" % "jetty-server"    % "7.6.8.v20121106",
         /** Workaround for SPARK-959. Dependency used by org.eclipse.jetty. Fixed in ivy 2.3.0. */
         "org.eclipse.jetty.orbit" % "javax.servlet" % "2.5.0.v201103041518" artifacts Artifact("javax.servlet", "jar", "jar"),