Update "Building reference documentation" section

This commit also changes `spring-boot-maven-plugin/pom.xml` to make it
work with `full` Maven profile.

Closes gh-11045

README.adoc

@@ -131,7 +131,7 @@ available so you need to build that first since it's not generated by default.
 
 [indent=0]
 ----
-	$ ./mvnw clean install -pl spring-boot-tools/spring-boot-maven-plugin -Pdefault,full
+	$ ./mvnw clean install -pl spring-boot-project/spring-boot-tools/spring-boot-maven-plugin -Pdefault,full
 ----
 
 The documentation also includes auto-generated information about the starters. You might
@@ -140,17 +140,17 @@ it:
 
 [indent=0]
 ----
-	$ ./mvnw clean install -f spring-boot-starters
+	$ ./mvnw clean install -f spring-boot-project/spring-boot-starters
 ----
 
 Once this is done, you can build the reference documentation with the command below:
 
 [indent=0]
 ----
-	$ ./mvnw clean prepare-package -pl spring-boot-docs -Pdefault,full
+	$ ./mvnw clean prepare-package -pl spring-boot-project/spring-boot-docs -Pdefault,full
 ----
 
-TIP: The generated documentation is available from `spring-boot-docs/target/contents/reference`
+TIP: The generated documentation is available from `spring-boot-project/spring-boot-docs/target/contents/reference`
 
 
 == Modules

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/pom.xml

@@ -201,22 +201,53 @@
 					<plugin>
 						<groupId>org.apache.maven.plugins</groupId>
 						<artifactId>maven-invoker-plugin</artifactId>
+						<configuration>
+							<localRepositoryPath>${project.build.directory}/local-repo</localRepositoryPath>
+						</configuration>
+						<executions>
+							<execution>
+								<id>prepare-integration-test</id>
+								<phase>pre-integration-test</phase>
+								<goals>
+									<goal>install</goal>
+								</goals>
+							</execution>
+							<execution>
+								<id>integration-test</id>
+								<goals>
+									<goal>run</goal>
+								</goals>
 								<configuration>
 									<cloneProjectsTo>${project.build.directory}/it</cloneProjectsTo>
 									<settingsFile>src/it/settings.xml</settingsFile>
-							<localRepositoryPath>${project.build.directory}/local-repo</localRepositoryPath>
 									<postBuildHookScript>verify</postBuildHookScript>
 									<addTestClassPath>true</addTestClassPath>
 									<skipInvocation>${skipTests}</skipInvocation>
 									<streamLogs>true</streamLogs>
 								</configuration>
+							</execution>
+						</executions>
+					</plugin>
+					<plugin>
+						<groupId>org.apache.maven.plugins</groupId>
+						<artifactId>maven-antrun-plugin</artifactId>
 						<executions>
 							<execution>
-								<id>integration-test</id>
+								<id>cleanup-local-integration-repo</id>
+								<phase>pre-integration-test</phase>
 								<goals>
-									<goal>install</goal>
 									<goal>run</goal>
 								</goals>
+								<configuration>
+									<target>
+										<replaceregexp match="\$\{revision\}" replace="${project.version}"
+													   flags="g" byline="true">
+											<fileset
+													dir="${project.build.directory}/local-repo/org/springframework/boot/"
+													includes="**/*.pom" />
+										</replaceregexp>
+									</target>
+								</configuration>
 							</execution>
 						</executions>
 					</plugin>