Tenant id filter test is not correct

The test_tenant_id_filter_converts_to_project_id_for_admin is not testing what
it is reporting.
To test that the tenant_id filter is actually mapped correctly to the
project_id filter, the request has to include the all_tenants options too.

That should be make clearer how the tenant_id option actually works.

Change-Id: Id6e8c9d2f39d4dd7ce3bb60400d9cf52c9133f48
Merge "Tenant id filter test is not correct"