Upgrade Reactor BOM

Author: garyrussell

build.gradle

@@ -62,7 +62,7 @@ ext {
 	log4jVersion = '2.12.1'
 	micrometerVersion = '1.3.0'
 	mockitoVersion = '3.0.0'
-	reactorVersion = 'Dysprosium-RELEASE'
+	reactorVersion = 'Dysprosium-SR1'
 	scalaVersion = '2.12'
 	springRetryVersion = '1.2.4.RELEASE'
 	springVersion = '5.2.1.RELEASE'