Upgrade to Undertow 1.3.27

Author: jhoeller

build.gradle

@@ -77,7 +77,7 @@ configure(allprojects) { project ->
 	ext.tiles3Version        = "3.0.7"
 	ext.tomcatVersion        = "8.5.11"
 	ext.tyrusVersion         = "1.3.5"  // constrained by WebLogic 12.1.3 support
-	ext.undertowVersion      = "1.3.26.Final"
+	ext.undertowVersion      = "1.3.27.Final"
 	ext.xmlunitVersion       = "1.6"
 	ext.xstreamVersion       = "1.4.9"