HADOOP-16871. Upgrade Netty version to 4.1.45.Final to handle CVE-2019-20444,CVE-2019-16869

hadoop-project/pom.xml

@@ -140,7 +140,7 @@
     <htrace4.version>4.1.0-incubating</htrace4.version>
     <metrics.version>3.2.4</metrics.version>
     <netty3.version>3.10.6.Final</netty3.version>
-    <netty4.version>4.1.42.Final</netty4.version>
+    <netty4.version>4.1.45.Final</netty4.version>
 
     <!-- Maven protoc compiler -->
     <protobuf-maven-plugin.version>0.5.1</protobuf-maven-plugin.version>