Add a couple of fixes for PIT

[vsedmik]

Proposed changes:

1. Use test_positive_install_multiple_in_host instead of test_errata_installation_with_swidtags for PIT testing.
2. When updating CV in content_facet_atttributes we need to provide LCE too.
3. In 6.16 subscription_status was removed. Assert host registration via uuid instead.

[vsedmik]

trigger: test-robottelo
pytest: tests/foreman/api/test_subscription.py::test_sca_end_to_end tests/foreman/cli/test_contentaccess.py::test_positive_erratum_installable

[Satellite-QE]

PRT Result

Build Number: 7290
Build Status: SUCCESS
PRT Comment: pytest tests/foreman/api/test_subscription.py::test_sca_end_to_end tests/foreman/cli/test_contentaccess.py::test_positive_erratum_installable --external-logging
Test Result : ================== 2 passed, 58 warnings in 777.46s (0:12:57) ==================