How to allow testing with a different version from the command line

pom.xml

<project>
  ...
  <dependencyManagement>
    <dependencies>
      ...
      <dependency>
        <groupId>com.example.foo</groupId>
        <artifactId>bar</artifactId>
        <version>1.2.3</version>
      </dependency>
      ...
    </dependencies>
  </dependencyManagement>
  ...
  <profiles>
    <profile>
      <id>foo-bar-version</id>
      <!-- support testing with a different version of foo-bar -->
      <activation>
        <property>
          <name>foo-bar-version</name> <!-- remember folks, properties with . can cause surprise issues -->
        </property>
      </activation>
      <dependencyManagement>
        <dependencies>
          <dependency>
            <groupId>com.example.foo</groupId>
            <artifactId>bar</artifactId>
            <version>${foo-bar-version}</version>
          </dependency>
        </dependencies>
      </dependencyManagement>
    </profile>
  </profiles>
</project>