Restrict Liberty deployment tests to Java 8

OpenLiberty does not yet support Java 9 or 10 and stopping the server
currently hangs when using Java 10.

Closes gh-13141

spring-boot-tests/spring-boot-deployment-tests/spring-boot-deployment-test-wlp/pom.xml

@@ -42,46 +42,54 @@
 			<scope>test</scope>
 		</dependency>
 	</dependencies>
-	<build>
-		<plugins>
-			<plugin>
-				<groupId>org.codehaus.mojo</groupId>
-				<artifactId>build-helper-maven-plugin</artifactId>
-				<executions>
-					<execution>
-						<id>reserve-network-port</id>
-						<goals>
-							<goal>reserve-network-port</goal>
-						</goals>
-						<phase>process-resources</phase>
+	<profiles>
+		<profile>
+			<id>jdk8</id>
+			<activation>
+				<jdk>1.8</jdk>
+			</activation>
+			<build>
+				<plugins>
+					<plugin>
+						<groupId>org.codehaus.mojo</groupId>
+						<artifactId>build-helper-maven-plugin</artifactId>
+						<executions>
+							<execution>
+								<id>reserve-network-port</id>
+								<goals>
+									<goal>reserve-network-port</goal>
+								</goals>
+								<phase>process-resources</phase>
+								<configuration>
+									<portNames>
+										<portName>appserver.port</portName>
+									</portNames>
+								</configuration>
+							</execution>
+						</executions>
+					</plugin>
+					<plugin>
+						<groupId>org.codehaus.cargo</groupId>
+						<artifactId>cargo-maven2-plugin</artifactId>
 						<configuration>
-							<portNames>
-								<portName>appserver.port</portName>
-							</portNames>
+							<configuration>
+								<properties>
+									<cargo.servlet.port>${appserver.port}</cargo.servlet.port>
+								</properties>
+							</configuration>
 						</configuration>
-					</execution>
-				</executions>
-			</plugin>
-			<plugin>
-				<groupId>org.codehaus.cargo</groupId>
-				<artifactId>cargo-maven2-plugin</artifactId>
-				<configuration>
-					<configuration>
-						<properties>
-							<cargo.servlet.port>${appserver.port}</cargo.servlet.port>
-						</properties>
-					</configuration>
-				</configuration>
-			</plugin>
-			<plugin>
-				<groupId>org.apache.maven.plugins</groupId>
-				<artifactId>maven-failsafe-plugin</artifactId>
-				<configuration>
-					<systemPropertyVariables>
-						<port>${appserver.port}</port>
-					</systemPropertyVariables>
-				</configuration>
-			</plugin>
-		</plugins>
-	</build>
+					</plugin>
+					<plugin>
+						<groupId>org.apache.maven.plugins</groupId>
+						<artifactId>maven-failsafe-plugin</artifactId>
+						<configuration>
+							<systemPropertyVariables>
+								<port>${appserver.port}</port>
+							</systemPropertyVariables>
+						</configuration>
+					</plugin>
+				</plugins>
+			</build>
+		</profile>
+	</profiles>
 </project>