Upgrade to RxJava 2.1.17, Tomcat 8.5.33, Netty 4.1.29

Author: jhoeller

build.gradle

@@ -47,14 +47,14 @@ ext {
 	junitVintageVersion  = "4.12.3"
 	kotlinVersion        = "1.2.51"
 	log4jVersion         = "2.11.1"
-	nettyVersion         = "4.1.25.Final"
+	nettyVersion         = "4.1.29.Final"
 	reactorVersion       = "Bismuth-SR10"
 	rxjavaVersion        = "1.3.8"
 	rxjavaAdapterVersion = "1.2.1"
-	rxjava2Version       = "2.1.16"
+	rxjava2Version       = "2.1.17"
 	slf4jVersion         = "1.7.25"	  // spring-jcl + consistent 3rd party deps
 	tiles3Version        = "3.0.8"
-	tomcatVersion        = "8.5.32"
+	tomcatVersion        = "8.5.33"
 	undertowVersion      = "1.4.25.Final"
 
 	gradleScriptDir = "${rootProject.projectDir}/gradle"