Ignore javadoc errors in Henshin code

Author: stefan-ka

build.gradle

@@ -41,6 +41,10 @@ signing {
  required { gradle.taskGraph.hasTask("publishMavenJavaPublicationToMavenLocal") || gradle.taskGraph.hasTask("publishMavenJavaPublicationToMavenRepository") }
 }
 
+javadoc {
+ failOnError = false
+}
+
 publishing {
  publications {
  mavenJava(MavenPublication) {