Polish contribution

Move documentation to a dedicated module (`initializr-docs`) with a test
that uses the stubs with the Spring Cloud Contract runner.

See gh-295

initializr-web/pom.xml

@@ -109,20 +109,28 @@
 		</dependency>
 	</dependencies>
 
-	<dependencyManagement>
-		<dependencies>
-			<dependency>
-				<groupId>org.springframework.cloud</groupId>
-				<artifactId>spring-cloud-dependencies</artifactId>
-				<version>Camden.RELEASE</version>
-				<type>pom</type>
-				<scope>import</scope>
-			</dependency>
-		</dependencies>
-	</dependencyManagement>
-
 	<build>
 		<plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-assembly-plugin</artifactId>
+				<executions>
+					<execution>
+						<id>stub</id>
+						<phase>prepare-package</phase>
+						<goals>
+							<goal>single</goal>
+						</goals>
+						<inherited>false</inherited>
+						<configuration>
+							<attach>true</attach>
+							<descriptors>
+								<descriptor>${basedir}/src/assembly/stub.xml</descriptor>
+							</descriptors>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-jar-plugin</artifactId>

initializr-web/src/assembly/stub.xml

@@ -0,0 +1,19 @@
+<assembly
+	xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.3"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.3 http://maven.apache.org/xsd/assembly-1.1.3.xsd">
+	<id>stubs</id>
+	<formats>
+		<format>jar</format>
+	</formats>
+	<includeBaseDirectory>false</includeBaseDirectory>
+	<fileSets>
+		<fileSet>
+			<directory>target/snippets/stubs</directory>
+			<outputDirectory>META-INF/${project.groupId}/${project.artifactId}/${project.version}/mappings</outputDirectory>
+			<includes>
+				<include>**/*</include>
+			</includes>
+		</fileSet>
+	</fileSets>
+</assembly>