Revert "Bump netty-all from 4.1.5.Final to 4.1.42.Final"

Author: davidxia

pom.xml

@@ -292,7 +292,7 @@
             <dependency>
                 <groupId>io.netty</groupId>
                 <artifactId>netty-all</artifactId>
-                <version>4.1.42.Final</version>
+                <version>4.1.5.Final</version>
             </dependency>
             <dependency>
                 <groupId>com.google.cloud</groupId>