Allow building SNAPSHOT-coupled submodules

[hinerm]

RequireReproducibleBuilds only allows SNAPSHOT-coupled multi-module reactors when built from the top level. Building a submodule individually fails.

It seems that this is problematic, e.g. with the Eclipse maven plugin building each submodule individually (and thus always failing).

[hinerm]

proposed solution:

1. Get the base project's parent
2. Check the modules to see if the base project's artifactId is listed.
   • If so, add the project and all other listed modules managed by that pom to the "reactor" list
   • If not, recurse to the next parent