Phillip Webb 05a6447a8d Polish "Resolve errors in layers.xsd"
Validate loaded `layer.xml` files against the XSD and additionally
update `<layers>` sub elements to have a 'minOccurs' of 0.

See gh-31126
2022-05-19 18:01:55 -07:00
..
2022-05-19 18:01:55 -07:00