Issue #10985: Maven allows random namespaces on project

[raupachz]

Bugfix for Issue #10985.

This code only extends commit 46d93dab.

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[gnodet]

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[gnodet]

We need to be able to parse 4.0.0 POM files with no namespace, but that is not allowed for 4.1.0 POM files.
I'm not sure we want to restrict namespaces when reading 4.0.0 files. That can be checked for build POM, but not when consuming them from a repository. So we need to make that dependent on the validationLevel to preserve compatibility.

[raupachz]

...

[raupachz]

We need to be able to parse 4.0.0 POM files with no namespace, but that is not allowed for 4.1.0 POM files.
I'm not sure we want to restrict namespaces when reading 4.0.0 files. That can be checked for build POM, but not when consuming them from a repository. So we need to make that dependent on the validationLevel to preserve compatibility.

Thanks. I did not know that. It looked simpler from the bug description.