One minor comment:  We should eventually clean up this reference to "dspace-pom".  This old "dspace-pom" concept is no longer maintained or used.  We should work to remove it and instead have the main 'dspace-solr" pom.xml setup similar to the root pom.xml in the main DSpace source.

That work doesn't have to happen in this pull request. But, we should do it preferably before 4.0, to avoid referencing this now outdated 'dspace-pom'.  I'd be willing to help with it as needed.