Impacted versions:
master

Steps to reproduce:
On the video

Current behavior:
You have to write the name of the group only

Expected behavior:
Either Writing the code or the name of an Account Group fetch the record 

Video/Screenshot link (optional):
https://drive.google.com/file/d/0B1w9gokcJL9hVWpaMTdGQ3RlLTQ/view

addons/account/models/account.py
_inherit = "res.partner.bank"
    journal_id = fields.One2many('account.journal', 'bank_account_id', domain=[('type', '=', 'bank')], string='Account Journal', readonly=True,
        help="The accounting journal corresponding to this bank account.")
    @api.one
    @api.constrains('journal_id')
    def _check_journal_id(self):
        if len(self.journal_id) > 1:
            raise ValidationError(_('A bank account can only belong to one journal.'))
class AccountTaxGroup(models.Model):
    _name = 'account.tax.group'
    _order = 'sequence asc'
    name = fields.Char(required=True, translate=True)
    sequence = fields.Integer(default=10)
class AccountTax(models.Model):
    _name = 'account.tax'
    _description = 'Tax'
    _order = 'sequence'
    @api.model
    def _default_tax_group(self):