chore: pick ribbon starter from master.

pom.xml

@@ -85,6 +85,7 @@
 		<module>spring-cloud-starter-kubernetes-config</module>
 		<module>spring-cloud-starter-kubernetes-netflix</module>
 		<module>spring-cloud-starter-kubernetes-zipkin</module>
+		<module>spring-cloud-starter-kubernetes-ribbon</module>
 		<module>spring-cloud-starter-kubernetes-all</module>
 		<module>spring-cloud-kubernetes-examples</module>
 		<module>spring-cloud-kubernetes-leader</module>

spring-cloud-starter-kubernetes-ribbon/pom.xml

@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Copyright 2013-2018 the original author or authors.
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~
+  -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+		 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<parent>
+		<artifactId>spring-cloud-kubernetes</artifactId>
+		<groupId>org.springframework.cloud</groupId>
+		<version>0.2.1.BUILD-SNAPSHOT</version>
+	</parent>
+	<modelVersion>4.0.0</modelVersion>
+
+	<groupId>org.springframework.cloud</groupId>
+	<artifactId>spring-cloud-starter-kubernetes-ribbon</artifactId>
+	<name>Spring Cloud Kubernetes :: Starter :: Ribbon</name>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-kubernetes-core</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-kubernetes-discovery</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-kubernetes-ribbon</artifactId>
+		</dependency>
+	</dependencies>
+
+</project>