[FIX] project_timesheet: test used fields added not in dependencies

The fields procure_method and supply_method are not present if we just install project_timesheet which makes the tests fail (opw 610590).
[FIX] account_analytic_plan: correctly check context

The id of the journal is passed in the context. Avoid trying to browse on jounral_id=False
Fixes #821
[FIX] yaml tests: extra key in on_change result isn't that bad.

In the return result of an on_change, having keys which are not ine the view is not that bad, it is not an actual problem.

Display warning instead of asserting all the keys are in the views.
[FIX] account_anglo_savon: round prices according to account precision to avoid getting unbalanced move

The standard move_line_get from account.invoice returns prices rounded (price_subtotal field as account precision) while the anglo-saxon module could return dict with non-rounded prices.
With amounts with bigger precision, we could get a difference of a few cents when comparing the debit/credits and then not be able to balance the invoice (opw 597208).
[FIX] pos: display cashier name on receipt, not the user
[MERGE] forward port of branch 7.0 up to 5f696ba