[automerger skipped] Make Ethernet interfaces more testable. am: fb336e9296 am: 5cc44b3cdd am: ab6fe7445b am: 2af1f3b8b0 -s ours

am skip reason: Change-Id I86eef7a93267f800dbfc8eafd307effa76a344ca with SHA-1 fb336e9296 is in history

Change-Id: I4562315db7b0d4e933d22aa0872a989fa243e5fb
tree: a02713025e69b8de6354fed91802b443f648442c
  1. service-t/
  2. tests/