Update llx_commande_fournisseur.sql

increase size of ref supplier (some supplier are very long ref...)
Update llx_commande_fournisseur.sql

extend ref fields size (like for customer commande)
Update llx_facture_fourn.sql

increase ref fields size (like customers facture)
Update 3.6.0-3.7.0.sql

increase fieds size of ref supplier (order and bill)
Merge pull request #2019 from defrance69/patch-27

Patch 27