FIX - adjust WMS GetCapabilities response with XML schema

[Bang Pham Huu]

This ticket is a break change → for major release version.

A quick check shows that, this section (valid in WCS GetCapabilities schema) should not exist directly under <Layer> element, it should be put under <Abstract> element instead (like with rasdaman-query style's <Abstract> element which contains query fragment).

                <ows:AdditionalParameters xmlns:ows="http://www.opengis.net/ows/2.0">
                    <ows:AdditionalParameter>
                        <ows:Name>sizeInBytes</ows:Name>
                        <ows:Value>5359440</ows:Value>
                    </ows:AdditionalParameter>
                    <ows:AdditionalParameter>
                        <ows:Name>axisList</ows:Name>
                        <ows:Value>era,model,scenario,snowpack,X,Y</ows:Value>
                    </ows:AdditionalParameter>
                </ows:AdditionalParameters>

And with some small invalid elements as well.