[MNG-7421] DefaultVersionRangeResolver do not query the custom repository

**[Christoph Läubrich](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=laeubi)** opened **[MNG-7421](https://issues.apache.org/jira/browse/MNG-7421?redirect=false)** and commented

DefaultVersionRangeResolver.readVersions(RepositorySystemSession, RequestTrace, Metadata, ArtifactRepository, VersionRangeResult) only works if there is a metadata.xml

If no metadata is found, it would be good if the org.apache.maven.artifact.repository.ArtifactRepository.findVersions(Artifact) is queried instead.

The usecase for this is that tycho has a custom repository layout that do not has a metadata avaiable but provides a custom layout implementation instead.

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No further details from [MNG-7421](https://issues.apache.org/jira/browse/MNG-7421?redirect=false)