Allow integration tests to use custom repos

Update integration tests so that they can use a custom local Maven
repository.

See gh-9316

spring-boot-tests/spring-boot-integration-tests/spring-boot-integration-tests-embedded-servlet-container/pom.xml

@@ -54,6 +54,7 @@
 				<configuration>
 					<systemPropertyVariables>
 						<maven.home>${maven.home}</maven.home>
+						<repository>${repository}</repository>
 					</systemPropertyVariables>
 				</configuration>
 			</plugin>

spring-boot-tests/spring-boot-integration-tests/spring-boot-integration-tests-embedded-servlet-container/src/test/java/org/springframework/boot/context/embedded/ApplicationBuilder.java

@@ -25,6 +25,7 @@ import java.io.IOException;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Properties;
 import java.util.jar.JarOutputStream;
 import java.util.zip.ZipEntry;
 
@@ -37,6 +38,7 @@ import org.apache.maven.shared.invoker.MavenInvocationException;
 import org.junit.rules.TemporaryFolder;
 
 import org.springframework.util.FileCopyUtils;
+import org.springframework.util.StringUtils;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
@@ -128,6 +130,12 @@ class ApplicationBuilder {
 		InvocationRequest invocation = new DefaultInvocationRequest();
 		invocation.setBaseDirectory(appFolder);
 		invocation.setGoals(Collections.singletonList("package"));
+		String repository = System.getProperty("repository");
+		if (StringUtils.hasText(repository) && !repository.equals("${repository}")) {
+			Properties properties = new Properties();
+			properties.put("repository", repository);
+			invocation.setProperties(properties);
+		}
 		InvocationResult execute = new DefaultInvoker().execute(invocation);
 		assertThat(execute.getExitCode()).isEqualTo(0);
 	}

spring-boot-tests/spring-boot-integration-tests/spring-boot-integration-tests-embedded-servlet-container/src/test/resources/pom-template.xml

@@ -61,4 +61,32 @@
 			</snapshots>
 		</repository>
 	</repositories>
+	<profiles>
+		<profile>
+			<id>repository</id>
+			<activation>
+				<property>
+					<name>repository</name>
+				</property>
+			</activation>
+			<repositories>
+				<repository>
+					<id>repository</id>
+					<url>${repository}</url>
+					<snapshots>
+						<enabled>true</enabled>
+					</snapshots>
+				</repository>
+			</repositories>
+			<pluginRepositories>
+				<pluginRepository>
+					<id>repository</id>
+					<url>${repository}</url>
+					<snapshots>
+						<enabled>true</enabled>
+					</snapshots>
+				</pluginRepository>
+			</pluginRepositories>
+		</profile>
+	</profiles>
 </project>