[FIX] Avoid "Error The taxes have different rates" with non deductible VAT and l10n_it_partially_deductible_vat
[FIX] Avoid "Error The taxes have different rates" with non deductible VAT and
l10n_it_partially_deductible_vat

https://launchpad.net/bugs/1198250
grap/OCB,OpenPymeMx/OCB,vrenaville/ngo-addons-backport,vrenaville/ngo-addons-backport,camptocamp/ngo-addons-backport,OpenPymeMx/OCB,credativUK/OCB,grap/OCB,OpenPymeMx/OCB,gdgellatly/OCB1,OpenPymeMx/OCB,gdgellatly/OCB1,gdgellatly/OCB1,camptocamp/ngo-addons-backport,grap/OCB,camptocamp/ngo-addons-backport,OpenPymeMx/OCB,OpenPymeMx/OCB,credativUK/OCB,grap/OCB,camptocamp/ngo-addons-backport,grap/OCB,OpenPymeMx/OCB,credativUK/OCB,gdgellatly/OCB1,credativUK/OCB,vrenaville/ngo-addons-backport,credativUK/OCB,camptocamp/ngo-addons-backport,credativUK/OCB,grap/OCB,credativUK/OCB,vrenaville/ngo-addons-backport,gdgellatly/OCB1,grap/OCB,vrenaville/ngo-addons-backport,gdgellatly/OCB1,credativUK/OCB,camptocamp/ngo-addons-backport,gdgellatly/OCB1,vrenaville/ngo-addons-backport,vrenaville/ngo-addons-backport,vrenaville/ngo-addons-backport,gdgellatly/OCB1,camptocamp/ngo-addons-backport,camptocamp/ngo-addons-backport,grap/OCB,OpenPymeMx/OCB