admin's tenant_id is not the same with load_balancer's tenant_id in tempest tests

[Madhusudhan Kandadai]

Here is the following scenario:

This is happening only WITH tempest tests by inheriting the necessary class from 'tempest/api/neutron':

(a) When creating a loadbalancer for non_admin user, I could see the 'tenant_id' is equal to loadbalancer.get('tenant_id'). This sounds good to me and requires no attention.

i.e.,

        credentials = cls.isolated_creds.get_primary_creds()
        mgr = tempest_clients.Manager(credentials=credentials)
        auth_provider = mgr.get_auth_provider(credentials)
        client_args = [auth_provider, 'network', 'regionOne']

(b) whereas, when I create a loadbalancer using admin credentials, the tenant_id NOT equals loadbalancer.get('tenant_id'). In general it SHOULD be equal.

i.e,.

        credentials_admin = cls.isolated_creds.get_admin_creds()
        mgr_admin = tempest_clients.Manager(credentials=credentials_admin)
        auth_provider_admin = mgr_admin.get_auth_provider(credentials_admin)
        client_args = [auth_provider_admin, 'network', 'regionOne']

Not sure why this is happening, the expected behavior should be "An user(either admin/non-admin) should be able to create a loadbalancer for the default tenant and that 'tenant_id' should be equal to the admin's 'tenant_id'. There are other test cases too specially for 'admin' role got succeeded and behaving properly.

Details about the code can be found at https://review.openstack.org/#/c/171832/7/neutron_lbaas/tests/tempest/v2/api/base.py

For the exact testcase:

(a) For admin_testcase: see line 55 - 61: https://review.openstack.org/#/c/171832/7/neutron_lbaas/tests/tempest/v2/api/test_load_balancers_admin.py
(b) For non_admin testcase: see line 259 -266: https://review.openstack.org/#/c/171832/7/neutron_lbaas/tests/tempest/v2/api/test_load_balancers_non_admin.py