yams #286912 schema2sql ignore 'skip_relations' argument [validation pending]

leading for an 'identity_relation' table to exist w/ cubicweb.

prioritynormal
typebug
done in0.41.0
load1.000
load left0.000
closed by#9a7c7df423ca [schema2sql] properly consider skip_relations parameters. Closes #286912
patch[schema2sql] properly consider skip_relations parameters. Closes #286912 [applied]