many2one in tables (by oid: value...) does not assert existence

[Guewen Baconnier @ Camptocamp]

Example:

  @rule @vat @ch
  Scenario: Create the fiscal position rule for 8.0% â 7.6%
    Given I am configuring the company with ref "scenario.comp_ch"
    Given I need a "account.fiscal.position.rule" with oid: scenario.fiscalpos_rule_76
    And having:
      | key | value |
      | name | TVA 7.6% avant 2011 |
      | description | Changement de TVA en suisse au 01.01.2011 |
      | company_id | by oid: scenario.comp_ch |
      | date_end | 2010-12-31 |
      | use_sale | True |
      | fiscal_position_id | by oid: scenario.fiscalpos_76 | # <----

If scenario.fiscalpos_76 does not exist, the account.fiscal.position.rule will be created with no fiscal position.

I expect the scenario to fail if the many2one relation is not found.