My gradle.build script looks like this:
buildscript {
    repositories {
        mavenCentral()
        maven { url 'https://repo.spring.io/simple/ext-release-local' }
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:1.1.9.RELEASE")
    }
}
apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'idea'
apply plugin: 'spring-boot'
apply plugin: 'war'
apply plugin: 'maven'
apply plugin: 'application'
jar {
    baseName = 'calc-service'
    version = '0.1.0'
}
ext {
    springBootVersion = '1.1.9.RELEASE'
    springIntegrationVersion = '4.0.3.RELEASE'
    springIntegrationKafkaVersion = '1.0.0.BUILD-SNAPSHOT'
}
repositories {
    mavenCentral()
    maven {
        url 'https://repository.apache.org/content/groups/public'
    }
    maven { url 'https://repo.springsource.org/libs-milestone' }
}
dependencies {
    compile 'org.springframework.boot:spring-boot-starter-web'
    compile 'org.springframework.boot:spring-boot-starter-actuator'
    compile 'org.projectreactor.spring:reactor-spring-context'
    compile 'javax.inject:javax.inject:1'
    //SI
   // compile "org.springframework.integration:spring-integration-core:$springIntegrationVersion"
    compile "org.springframework.integration:spring-integration-stream:$springIntegrationVersion"
    compile 'org.springframework.integration:spring-integration-mongodb:4.0.4.RELEASE'
    //kafka
    compile("org.springframework.integration:spring-integration-kafka:$springIntegrationKafkaVersion") {
        exclude module: 'log4j'
        exclude module: 'jms'
        exclude module: 'jmxtools'
        exclude module: 'jmxri'
    }
    compile("log4j:log4j:1.2.15") {
        exclude module: 'mail'
        exclude module: 'jms'
        exclude module: 'jmx'
        exclude module: 'jmxtools'
        exclude module: 'jmxri'
    }
    compile "commons-logging:commons-logging:1.1.1"
    //Required dependency for JSP
    providedRuntime 'org.apache.tomcat.embed:tomcat-embed-jasper'
    testCompile("org.springframework.boot:spring-boot-starter-test:$springBootVersion")
    testCompile("junit:junit")
}
task wrapper(type: Wrapper) {
    gradleVersion = '1.11'
}
I get this error:
Warning:<i><b>root project 'CalcMicroService': Web Facets/Artifacts will not be configured</b>
Details: org.gradle.api.artifacts.ResolveException: Could not resolve all dependencies for configuration ':runtime'.
Caused by: org.gradle.internal.resolve.ModuleVersionResolveException: Could not resolve org.springframework.integration:spring-integration-kafka:1.0.0.BUILD-SNAPSHOT.
Required by:
    :CalcMicroService:unspecified
Caused by: org.gradle.internal.resource.ResourceException: Unable to load Maven meta-data from https://repo.springsource.org/libs-milestone/org/springframework/integration/spring-integration-kafka/1.0.0.BUILD-SNAPSHOT/maven-metadata.xml.
Caused by: org.gradle.internal.resource.transport.http.HttpRequestException: Could not GET 'https://repo.springsource.org/libs-milestone/org/springframework/integration/spring-integration-kafka/1.0.0.BUILD-SNAPSHOT/maven-metadata.xml'.
Caused by: javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated</i>
struggeling this for hours Any idea?
Thanks.