How to use maven plugin tomcat7:run with multiple contexts (WARs)?

I've been using mvn tomcat7-maven-plugin:run -am -pl :foo successfully to run just a single project at a time in Tomcat like is shown here. Now I'd like to have multiple modules run under the same port but different contexts. For instance, I'd like to have:

/    => foo.war
/bar => bar.war

Here's an example pom.xml snippet that I've been working with:

<project><!-- ... -->
    <build><!-- ... -->
        <pluginManagement>
            <plugins>
                <plugin>
                    <groupId>org.apache.tomcat.maven</groupId>
                    <artifactId>tomcat7-maven-plugin</artifactId>
                    <version>2.0-SNAPSHOT</version>
                    <configuration>
                        <path>/</path>
                        <port>8080</port>
                        <addContextWarDependencies>true</addContextWarDependencies>
                        <addWarDependenciesInClassloader>true</addWarDependenciesInClassloader>
                        <warSourceDirectory>${project.build.directory}/${project.build.finalName}/</warSourceDirectory>
                    </configuration>
                    <dependencies>
                        <dependency>
                            <groupId>${project.groupId}</groupId>
                            <artifactId>bar</artifactId>
                            <version>${project.version}</version>
                            <type>war</type>
                            <scope>tomcat</scope>
                        </dependency>
                    </dependencies>
                </plu