Bump netty-all from 4.0.30.Final to 4.1.42.Final

Bumps [netty-all](https://github.com/netty/netty) from 4.0.30.Final to 4.1.42.Final.
- [Release notes](https://github.com/netty/netty/releases)
- [Commits](netty/netty@netty-4.0.30.Final...netty-4.1.42.Final)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -88,7 +88,7 @@
     <es.version>5.4.0</es.version>
     <es-hadoop.version>5.4.0</es-hadoop.version>
     <slf4j.version>1.7.5</slf4j.version>
-    <netty.version>4.0.30.Final</netty.version>
+    <netty.version>4.1.42.Final</netty.version>
     <log4j.version>2.7</log4j.version>
     <logback.version>1.1.7</logback.version>
     <commons.version>3.1</commons.version>