Make mvn verify work without install of spring-boot-dependencies

Previously, the custom layout sample could only be built successfully
if spring-boot-dependencies had be installed locally, making its
effective pom available in the local Maven cache.

This commit updates the sample's tests to look at its own pom to
determine the version of Spring Boot that should be used in the
Gradle tests.

Closes gh-8330

spring-boot-samples/spring-boot-sample-custom-layout/pom.xml

@@ -65,32 +65,6 @@
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-failsafe-plugin</artifactId>
 			</plugin>
-			<plugin>
-				<groupId>org.apache.maven.plugins</groupId>
-				<artifactId>maven-dependency-plugin</artifactId>
-				<executions>
-					<execution>
-						<id>copy-effective-pom</id>
-						<phase>generate-test-resources</phase>
-						<goals>
-							<goal>copy</goal>
-						</goals>
-						<configuration>
-							<artifactItems>
-								<artifactItem>
-									<groupId>org.springframework.boot</groupId>
-									<artifactId>spring-boot-dependencies</artifactId>
-									<version>${project.version}</version>
-									<type>effective-pom</type>
-									<overWrite>true</overWrite>
-									<outputDirectory>${project.build.directory}</outputDirectory>
-									<destFileName>dependencies-pom.xml</destFileName>
-								</artifactItem>
-							</artifactItems>
-						</configuration>
-					</execution>
-				</executions>
-			</plugin>
 		</plugins>
 		<pluginManagement>
 			<plugins>

spring-boot-samples/spring-boot-sample-custom-layout/src/test/java/sample/layout/GradleIT.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 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.
@@ -31,7 +31,7 @@ import org.xml.sax.InputSource;
 
 import org.springframework.util.FileCopyUtils;
 
-public class GradeIT {
+public class GradleIT {
 
 	@Test
 	public void sampleDefault() throws Exception {
@@ -60,7 +60,8 @@ public class GradeIT {
 		((DefaultGradleConnector) gradleConnector).embedded(true);
 		ProjectConnection project = gradleConnector.forProjectDirectory(projectDirectory)
 				.connect();
-		project.newBuild().forTasks("clean", "build")
+		project.newBuild().forTasks("clean", "build").setStandardOutput(System.out)
+				.setStandardError(System.err)
 				.withArguments("-PbootVersion=" + getBootVersion()).run();
 		Verify.verify(
 				new File("target/gradleit/" + name + "/build/libs/" + name + ".jar"),
@@ -69,7 +70,8 @@ public class GradeIT {
 
 	public static String getBootVersion() {
 		return evaluateExpression(
-				"/*[local-name()='project']/*[local-name()='version']" + "/text()");
+				"/*[local-name()='project']/*[local-name()='parent']/*[local-name()='version']"
+						+ "/text()");
 	}
 
 	private static String evaluateExpression(String expression) {
@@ -77,8 +79,7 @@ public class GradeIT {
 			XPathFactory xPathFactory = XPathFactory.newInstance();
 			XPath xpath = xPathFactory.newXPath();
 			XPathExpression expr = xpath.compile(expression);
-			String version = expr.evaluate(
+			String version = expr.evaluate(new InputSource(new FileReader("pom.xml")));
-					new InputSource(new FileReader("target/dependencies-pom.xml")));
 			return version;
 		}
 		catch (Exception ex) {