Bump netty 4.0 to latest release

- 4.0.37 seems to contain security bug-fix
  http://netty.io/news/2016/06/07/4-0-37-Final.html
  All other release notes: http://netty.io/news/

Change-Id: I820c268c0ff58527a43354927dd97ee5431d7b31
diff --git a/features/features.xml b/features/features.xml
index 807b85a..cad8e6a 100644
--- a/features/features.xml
+++ b/features/features.xml
@@ -25,12 +25,12 @@
         <bundle>mvn:commons-configuration/commons-configuration/1.10</bundle>
         <bundle>mvn:com.google.guava/guava/19.0</bundle>
         <bundle>mvn:io.netty/netty/3.10.5.Final</bundle>
-        <bundle>mvn:io.netty/netty-common/4.0.36.Final</bundle>
-        <bundle>mvn:io.netty/netty-buffer/4.0.36.Final</bundle>
-        <bundle>mvn:io.netty/netty-transport/4.0.36.Final</bundle>
-        <bundle>mvn:io.netty/netty-handler/4.0.36.Final</bundle>
-        <bundle>mvn:io.netty/netty-codec/4.0.36.Final</bundle>
-        <bundle>mvn:io.netty/netty-transport-native-epoll/4.0.36.Final</bundle>
+        <bundle>mvn:io.netty/netty-common/4.0.40.Final</bundle>
+        <bundle>mvn:io.netty/netty-buffer/4.0.40.Final</bundle>
+        <bundle>mvn:io.netty/netty-transport/4.0.40.Final</bundle>
+        <bundle>mvn:io.netty/netty-handler/4.0.40.Final</bundle>
+        <bundle>mvn:io.netty/netty-codec/4.0.40.Final</bundle>
+        <bundle>mvn:io.netty/netty-transport-native-epoll/4.0.40.Final</bundle>
         <bundle>mvn:commons-pool/commons-pool/1.6</bundle>
         <bundle>mvn:org.apache.commons/commons-math3/3.6.1</bundle>