Maven cargo in parent project with multiple submodules: tomcat port number is in use - maven

Question

I use maven cargo plugin and maven failsafe plugin to run my integration tests.
I have a parent project and two submodule projects:
IT-parent
--> IT-submodule1
--> IT-submodule2
My problem is Maven Cargo on parent project starts the tomcat, then also the submodules start and stop tomcat.
Parent pom.xml
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-failsafe-plugin</artifactId>
<version>2.8.1</version>
<executions>
<execution>
<id>integration-test</id>
<goals>
<goal>integration-test</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.codehaus.cargo</groupId>
<artifactId>cargo-maven2-plugin</artifactId>
<version>1.4.15</version>
<configuration>
<container>
<containerId>tomcat7x</containerId>
<type>installed</type>
<home>${CATALINA_HOME}</home>
</container>
<configuration>
<type>existing</type>
<home>${CATALINA_HOME}</home>
<properties>
<cargo.servlet.port>7080</cargo.servlet.port>
<cargo.tomcat.ajp.port>7009</cargo.tomcat.ajp.port>
<cargo.jvmargs>-Xms128m -Xmx512m -XX:MaxPermSize=256m</cargo.jvmargs>
</configuration>
<deployables>
...
</deployables>
</configuration>
<executions>
<!-- start server before integration tests -->
<execution>
<id>start-container</id>
<phase>pre-integration-test</phase>
<goals>
<goal>deployer-deploy</goal>
<goal>start</goal>
</goals>
</execution>
<!-- stop server after integration tests -->
<execution>
<id>stop-container</id>
<phase>post-integration-test</phase>
<goals>
<goal>deployer-undeploy</goal>
<goal>stop</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
Submodule pom.xml has no <build> section.
Is there a way to start tomcat with maven cargo once at parent project and submodules run only integration tests in that container. So I wouldn't have a series of start/stop tomcat equals to the number of submodules.

Answer 1

1.Parent pom.xml
Move maven-failsafe-plugin to plugin management:
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-failsafe-plugin</artifactId>
<version>2.8.1</version>
<executions>
<execution>
<id>integration-test</id>
<goals>
<goal>integration-test</goal>
</goals>
..
..
2.Parent pom.xml
+ IT-submodule1
+ IT-submodule2
Activate maven-failsafe-plugin in IT-submodule1 =>
Add declaration
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-failsafe-plugin</artifactId>
<plugin>
</plugins>