Docker images (#527)

with this change we're adding generation of 2 docker images - verifier and stub runner
we also added a project `spring-cloud-contract-stub-runner-boot` which contains a far jar with stub runner boot

fixes gh-526, gh-516

docker/pom.xml

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<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">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.springframework.cloud</groupId>
+		<artifactId>spring-cloud-contract-parent</artifactId>
+		<version>1.2.3.BUILD-SNAPSHOT</version>
+		<relativePath>..</relativePath>
+	</parent>
+
+	<artifactId>spring-cloud-contract-docker-parent</artifactId>
+	<packaging>pom</packaging>
+	<version>1.2.3.BUILD-SNAPSHOT</version>
+	<name>Spring Cloud Contract Docker Parent</name>
+	<description>Spring Cloud Contract Docker Parent</description>
+
+	<properties>
+		<docker.registry.organization>spring-cloud</docker.registry.organization>
+	</properties>
+
+	<modules>
+		<module>spring-cloud-contract-docker</module>
+		<module>spring-cloud-contract-stub-runner-docker</module>
+	</modules>
+
+	<build>
+		<plugins>
+			<plugin>
+				<artifactId>maven-deploy-plugin</artifactId>
+				<version>2.8.2</version>
+				<configuration>
+					<skip>true</skip>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>