[FIX] l10n_nz: Tax template name conflict (AU/NZ)
[FIX] l10n_nz: Tax template name conflict (AU/NZ)

Rectify name conflict in tax templates between NZ and AU chart of
accounts. Otherwise, it's impossible to install both charts of accounts
at the same time.

Fixes #12600
Closes #12758

Elico-Corp/odoo_OCB,storm-computers/odoo,microcom/odoo,bplancher/odoo,Elico-Corp/odoo_OCB,hip-odoo/odoo,microcom/odoo,ygol/odoo,Elico-Corp/odoo_OCB,bplancher/odoo,storm-computers/odoo,laslabs/odoo,laslabs/odoo,microcom/odoo,hip-odoo/odoo,ygol/odoo,microcom/odoo,microcom/odoo,bplancher/odoo,storm-computers/odoo,storm-computers/odoo,laslabs/odoo,bplancher/odoo,Elico-Corp/odoo_OCB,storm-computers/odoo,hip-odoo/odoo,ygol/odoo,dfang/odoo,dfang/odoo,dfang/odoo,ygol/odoo,microcom/odoo,Elico-Corp/odoo_OCB,ygol/odoo,hip-odoo/odoo,Elico-Corp/odoo_OCB,laslabs/odoo,ygol/odoo,laslabs/odoo,dfang/odoo,laslabs/odoo,hip-odoo/odoo,bplancher/odoo,storm-computers/odoo,hip-odoo/odoo,bplancher/odoo,dfang/odoo,dfang/odoo,ygol/odoo