Apply Artifactory Gradle plugin

Instead of relying on the CI server to apply and configure this plugin,
this commit does it directly in the Spring Framework build.
This allows us to take full control over which projects are published
and how.

See gh-23282

Author: bclozel

Diff for: build.gradle

@@ -14,6 +14,7 @@ plugins {
 	id 'org.asciidoctor.convert' version '1.5.8'
 	id 'io.spring.nohttp' version '0.0.3.RELEASE'
 	id 'de.undercouch.download' version '4.0.0'
+	id "com.jfrog.artifactory" version '4.9.8' apply false
 }
 
 ext {

Diff for: gradle/publications.gradle

@@ -1,4 +1,5 @@
 apply plugin: "maven-publish"
+apply plugin: 'com.jfrog.artifactory'
 
 publishing {
 	publications {
@@ -37,4 +38,8 @@ publishing {
 			}
 		}
 	}
+}
+
+artifactoryPublish {
+	publications(publishing.publications.mavenJava)
 }

Diff for: gradle/spring-module.gradle

@@ -56,5 +56,3 @@ publishing {
 		}
 	}
 }
-
-

Diff for: integration-tests/integration-tests.gradle

@@ -20,8 +20,3 @@ dependencies {
 	testCompile("org.hsqldb:hsqldb:${hsqldbVersion}")
 	testCompile("org.hibernate:hibernate-core:5.1.17.Final")
 }
-
-// Avoid publishing JAR to the artifact repository
-if (pluginManager.hasPlugin("com.jfrog.artifactory")) {
-	artifactoryPublish.skip = true
-}

Diff for: spring-core/kotlin-coroutines/kotlin-coroutines.gradle

@@ -10,11 +10,6 @@ dependencies {
 	compile("org.jetbrains.kotlinx:kotlinx-coroutines-reactor")
 }
 
-// Avoid publishing JAR to the artifact repository
-if (pluginManager.hasPlugin("com.jfrog.artifactory")) {
-	artifactoryPublish.skip = true
-}
-
 eclipse {
 	project {
 		buildCommand "org.jetbrains.kotlin.ui.kotlinBuilder"