The parntner reaction to link status changes of iut_port

The parntner reaction to link status changes on iut_port

Check how the parntner reacts to link status changes of iut_port

1. Initialize EAL and start the iut_port

2. Wait for interface to become UP on Tester side

3. Make sure statuses on tst_if and iut_port realy are "up"

4. Link down the iut_port

5. Link up the iut_port

6. Wait for interface to become UP on Tester side

7. Make sure statuses on tst_if and iut_port realy are "up"