[11.0][MIG] hr_timesheet_sheet (OCA#125)

* [10.0] hr_timesheet_sheet

* [11.0][MIG] hr_timesheet_sheet

* [REMOVE] hr_timesheet.sheet.account

* [REMOVE] 'new' state

* [ADD] Tests

* [UPD] Adapt to multicompany

* [ADD] Add more tests (include multicompany tests)

* [FIX] project_task_stage_allow_timesheet: show error message only if task

* [ADD] Migration scripts to v11

project_task_stage_allow_timesheet/models/account_analytic_line.py

@@ -18,7 +18,7 @@ def _check_task_allow_timesheet(self):
         for rec in self:
             task = rec.task_id
             stage = task.stage_id
-            if not stage.allow_timesheet:
+            if task and not stage.allow_timesheet:
                 raise ValidationError(_(
                     "You can't link a timesheet line to a task if its stage "
                     "doesn't allow it. (Task: %s, Stage: %s)"