ZOOKEEPER-3563: Update Netty to fix CVE-2019-16869

…E-2019-16869 on Netty

Updated netty to 4.1.42.Final to address CVE-2019-16869

Change-Id: Ia14d695815143cdfcda1d2efcc0d83211cb356dd

Author: Patrick Hunt <phunt@apache.org>

Reviewers: Enrico Olivelli <eolivelli@apache.org>, Norbert Kalmar <nkalmar@apache.org>, Brian Nixon <brian.nixon.cs@gmail.com

Closes #1102 from phunt/zk3563_br35

(cherry picked from commit 82b04e852aa46917274964d01565be931353248f)
Signed-off-by: Norbert Kalmar <nkalmar@apache.org>
diff --git a/build.xml b/build.xml
index 21ed6a1..edb3ace 100644
--- a/build.xml
+++ b/build.xml
@@ -37,7 +37,7 @@
 
     <property name="audience-annotations.version" value="0.5.0" />
 
-    <property name="netty.version" value="4.1.29.Final"/>
+    <property name="netty.version" value="4.1.42.Final"/>
 
     <property name="junit.version" value="4.12"/>
     <property name="mockito.version" value="2.27.0"/>
diff --git a/pom.xml b/pom.xml
index 891373f..068f211 100755
--- a/pom.xml
+++ b/pom.xml
@@ -278,7 +278,7 @@
     <hamcrest.version>1.3</hamcrest.version>
     <commons-cli.version>1.2</commons-cli.version>
     <jetty.version>9.4.17.v20190418</jetty.version>
-    <netty.version>4.1.29.Final</netty.version>
+    <netty.version>4.1.42.Final</netty.version>
     <jackson.version>2.9.10</jackson.version>
     <json.version>1.1.1</json.version>
     <jline.version>2.11</jline.version>