Adding NoHttp check

* Upgrading gradle to latest 4.13

build.gradle

@@ -24,9 +24,18 @@ buildscript {
 		classpath("io.spring.gradle:spring-io-plugin:0.0.8.RELEASE")
 		classpath("org.asciidoctor:asciidoctor-gradle-plugin:1.5.3")
 		classpath("org.jfrog.buildinfo:build-info-extractor-gradle:4.7.5")
+		classpath("io.spring.nohttp:nohttp-gradle:0.0.1.RELEASE")
 	}
 }
 
+// NoHttp has to be applied at the root level
+// so that it reads all the root files, including the gradle ones.
+apply plugin: "io.spring.nohttp"
+
+checkstyle {
+	toolVersion = 8.16
+}
+
 configure(allprojects) {
 	group = "org.springframework.cloud"
 	
@@ -63,6 +72,10 @@ configure(allprojects) {
 		maven { url "https://repo.spring.io/libs-release" }
 	}
 
+	dependencies {
+		testRuntimeOnly("io.spring.nohttp:nohttp:0.0.1.RELEASE")
+	}
+
 	if (project.hasProperty("springVersion") || project.hasProperty("springBootVersion") || project.hasProperty("reactorVersion")) {
 		repositories {
 			maven { url "https://repo.spring.io/libs-snapshot" }

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.3-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists