Update boot version in other build samples

Add replace goals to update the Spring Boot version in the gradle and
ant samples during the release process.

Fixes spring-projectsgh-425

pom.xml

@@ -62,6 +62,12 @@
 					<artifactId>maven-surefire-plugin</artifactId>
 					<version>2.17</version>
 				</plugin>
+				<plugin>
+					<groupId>com.google.code.maven-replacer-plugin</groupId>
+					<artifactId>replacer</artifactId>
+					<version>1.5.3</version>
+				</plugin>
+
 			</plugins>
 		</pluginManagement>
 	</build>
@@ -204,6 +210,40 @@
 							<skip>true</skip>
 						</configuration>
 					</plugin>
+					<plugin>
+						<groupId>com.google.code.maven-replacer-plugin</groupId>
+						<artifactId>replacer</artifactId>
+						<executions>
+							<execution>
+								<id>fixup-gradle-samples</id>
+								<phase>verify</phase>
+								<goals>
+									<goal>replace</goal>
+								</goals>
+								<configuration>
+									<includes>
+										<include>${basedir}/spring-boot-samples/**/build.gradle</include>
+									</includes>
+									<token>springBootVersion\s+.*+</token>
+									<value>springBootVersion = '${project.version}'</value>
+								</configuration>
+							</execution>
+							<execution>
+								<id>fixup-ant-samples</id>
+								<phase>verify</phase>
+								<goals>
+									<goal>replace</goal>
+								</goals>
+								<configuration>
+									<includes>
+										<include>${basedir}/spring-boot-samples/**/build.xml</include>
+									</includes>
+									<token>spring-boot\.version\"\s.*+</token>
+									<value>spring-boot.version" value="${project.version}" /></value>
+								</configuration>
+							</execution>
+						</executions>
+					</plugin>
 				</plugins>
 			</build>
 		</profile>