upgrade to netty 4.1.110 due to CVEs

Author: pjfanning

settings.gradle

@@ -107,4 +107,4 @@ gradle.ext.akka_management = [version : '1.0.5']
 gradle.ext.curator = [version : '4.3.0']
 gradle.ext.kube_client = [version: '4.10.3']
 
-gradle.ext.netty = [version : '4.1.87.Final']
+gradle.ext.netty = [version : '4.1.110.Final']