Tenant user can see and run reports from another tenant

[konyashkina]

From forum: https://forum.cuba-platform.com/t/sys-tenant-id-not-filled-in-report-report-en-report-group-tables/16294

Tenant user can see and run reports from another tenant.
E.g. in demo project multitenancy-addon-demo when adding a report as walmart_admin, the costco_admin has also access the report.
sys_tenant_id is not filled.

Tested on
demo project https://github.com/cuba-platform/multitenancy-addon-demo
CUBA Platform version: 7.2.4
CUBA Studio plugin version: 15.9-213

and updated:
CUBA Platform version: 7.2.19
CUBA Studio plugin version: 15.9-213