cubicweb-datacat #8303451 use a controller vocabulary to describe licence fields [validation pending]

Using ADMS licence type vocabulary found in http://purl.org/adms/licencetype/

prioritynormal
typeenhancement
done in0.5.0
load1.000
load left0.000
closed by#e92c7f46cacc Add LicenseDocument entity type and use it for DataCatalog and Distribution
patchAdd LicenseDocument entity type and use it for DataCatalog and Distribution [applied]