[11.0][FIX] l10n_ch_pain_base - fix error message (#425)
[11.0][FIX] l10n_ch_pain_base - fix error message (#425)

* [11.0][FIX] l10n_ch_pain_base - fix error message

Fix of the field used on the UsserError message when no CCP account is set.
The field 'partner_bank.name' doesn't exist, the corresponding field is 'partner_bank.acc_number'


brain-tec/l10n-switzerland,brain-tec/l10n-switzerland,brain-tec/l10n-switzerland