Tatlin driver does not set project id for temp volumes

[Vladislav Belogrudov]

tempest.api.volume.admin.test_volume_hosts.VolumeHostsAdminTestsJSON.test_show_host fails if its run happens concurrently with snapshot tests.

When doing snapshots Tatlin driver creates a temp volume with admin context, i.e. without project id. If at the same time we run "os-hosts" tests we get projects with null name and the tests fail with schema validation (project id must be string, not null)

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/cinder/+/858293

[Vladislav Belogrudov (vlad-belogrudov)]

http://tempest-openstack.spb.yadro.com/gerrit-trigger/626//result.log - also other tests have been affected, where user id is null