Before this commit, when the locale was not in english, the following
traceback was observed:
```
Uncaught (in promise) Error: The following error occurred in onWillStart: "res[employeeId][((intermediate value) + "_location_id")] is undefined"
OwlError owl.js:87
wrapError owl.js:2604
onWillStart owl.js:2647
useModelWithSampleData model.js:165
setup calendar_controller.js:48
setup attendee_calendar_controller.js:10
setup appointment_calendar_controller.js:15
setup google_calendar_controller.js:11
setup hr_homeworking_calendar_controller.js:12
setup microsoft_calendar_controller.js:11
```
closesodoo/odoo#139052
Signed-off-by: Arnaud Joset (arj) <arj@odoo.com>