Polish dependency management for XMLUnit

Closes gh-9709

spring-boot-dependencies/pom.xml

@@ -197,7 +197,7 @@
 		<webjars-locator.version>0.32-1</webjars-locator.version>
 		<wsdl4j.version>1.6.3</wsdl4j.version>
 		<xml-apis.version>1.4.01</xml-apis.version>
-		<xmlunit.version>2.3.0</xmlunit.version>
+		<xmlunit2.version>2.5.0</xmlunit2.version>
 		<!-- Plugin versions -->
 		<build-helper-maven-plugin.version>3.0.0</build-helper-maven-plugin.version>
 		<exec-maven-plugin.version>1.5.0</exec-maven-plugin.version>
@@ -2521,7 +2521,17 @@
 			<dependency>
 				<groupId>org.xmlunit</groupId>
 				<artifactId>xmlunit-core</artifactId>
-				<version>${xmlunit.version}</version>
+				<version>${xmlunit2.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>org.xmlunit</groupId>
+				<artifactId>xmlunit-legacy</artifactId>
+				<version>${xmlunit2.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>org.xmlunit</groupId>
+				<artifactId>xmlunit-matchers</artifactId>
+				<version>${xmlunit2.version}</version>
 			</dependency>
 			<dependency>
 				<groupId>org.yaml</groupId>