cubicweb-mercurial-server #7192049 hosted_by relation should not be composite [validation pending]

Deleting a MercurialServerConfig should not automatically delete Repository entities

prioritynormal
typebug
done in0.7.2
load left0.000
closed by#847a4e4a7864 [schema] hosted_by should not be composite (closes #7192049)
patch[schema] hosted_by should not be composite (closes #7192049) [applied]