Upgrade to Reactor Bismuth SR3

Author: rstoyanchev

build.gradle

@@ -53,7 +53,7 @@ configure(allprojects) { project ->
 	ext.kotlinVersion        = "1.1.51"
 	ext.log4jVersion         = "2.9.1"
 	ext.nettyVersion         = "4.1.16.Final"
-	ext.reactorVersion       = "Bismuth-SR2"
+	ext.reactorVersion       = "Bismuth-SR3"
 	ext.rxjavaVersion        = "1.3.3"
 	ext.rxjavaAdapterVersion = "1.2.1"
 	ext.rxjava2Version       = "2.1.5"