Wait for interface to detach for all interface tests

This patchset waits for interfaces to detach during
test clean up in MiscPolicyActionsNetworkRbacTest.
This is a follow up to [0], which missed clean up
for certain tests.

[0] I7b1a095bb73f4814b756f9493f9e353a8f98e7da

Change-Id: I041aaa7dce53f920b014c1cb586dc6bb3c10b489
1 file changed