Hello.

> If the referenced pom file is not installed, it won't be found by Maven
> later when we use it to run the maven-plugin-plugin. See for instance
> how the parent pom is installed in java-slf4j-parent, and propagated
> from java-slf4j-api (and recursively from java-slf4j-simple).

> This top-level pom also has the following, so it should propagate it:

> <parent>
>  <groupId>org.apache.maven</groupId>
>  <artifactId>maven-parent</artifactId>
>  <version>34</version>
>  <relativePath />
> </parent>

> We already have it: maven-parent-pom-34.

Done.  Please see the patch, I'm hoping it should be OK by now.