[integ-tests] Use command suitable for both RHEL and Ubuntu to retrie…

…ve network device name

The old command only works on RHEL.

Signed-off-by: Hanwen <[email protected]>

tests/integration-tests/tests/schedulers/test_slurm.py

@@ -1793,9 +1793,7 @@ def _test_torque_job_submit(remote_command_executor, test_datadir):
 def _submit_kill_networking_job(remote_command_executor, scheduler_commands, partition, node_type, num_nodes):
  """Submit job that will detach network interface on compute."""
  # Get network interface name from Head node, assuming Head node and Compute are of the same instance type
- interface_name = remote_command_executor.run_remote_command(
- "nmcli device status | grep ether | awk '{print $1}'"
- ).stdout
+ interface_name = remote_command_executor.run_remote_command("ls /sys/class/net | grep e").stdout
  logging.info("Detaching network interface {} on {} Compute nodes".format(interface_name, node_type))
  # Submit job that will detach network interface on all dynamic nodes
  return scheduler_commands.submit_command_and_assert_job_accepted(