Upgrade to Reactor 1.1.5.RELEASE

Closes gh-1742

spring-boot-dependencies/pom.xml

@@ -91,7 +91,7 @@
 		<mockito.version>1.9.5</mockito.version>
 		<mongodb.version>2.12.3</mongodb.version>
 		<mysql.version>5.1.32</mysql.version>
-		<reactor.version>1.1.4.RELEASE</reactor.version>
+		<reactor.version>1.1.5.RELEASE</reactor.version>
 		<reactor-spring.version>1.1.3.RELEASE</reactor-spring.version>
 		<servlet-api.version>3.0.1</servlet-api.version>
 		<slf4j.version>1.7.7</slf4j.version>