Merge changes Ic3d0a22e,I6d295bce,I40c38a1f,Ib27b18a1,I5e23fc17, ...

* changes:
  ethernet: further cleanup updateConfiguration tests
  ethernet: add test for updateConfiguration on untracked interface
  ethernet: fix updateConfiguration expectations
  ethernet: add LinkPropertiesChanged coverage in EthernetManagerTest
  ethernet: remove unit test cases that have end-to-end coverage
  ethernet: temporary mitigation for test that uses TUNSETCARRIER