Check interface is present in the VM

This patch enhances the method "wait_for_interface_status" from
tempest. Apart from checking the interface status returned by
Nova, this methods access the VM to check if the NIC interface
is already detected by the kernel.

Change-Id: I5e411c72e0b6a8d96535adb04ff15e903454141c
Closes-Bug: #1883095
diff --git a/neutron_tempest_plugin/scenario/test_ipv6.py b/neutron_tempest_plugin/scenario/test_ipv6.py
index 844f995..02e2846 100644
--- a/neutron_tempest_plugin/scenario/test_ipv6.py
+++ b/neutron_tempest_plugin/scenario/test_ipv6.py
@@ -16,7 +16,6 @@
 from neutron_lib import constants as lib_constants
 from oslo_log import log
 from tempest.common import utils as tempest_utils
-from tempest.common import waiters
 from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
@@ -158,9 +157,10 @@
         # And plug VM to the second IPv6 network
         ipv6_port = self.create_port(ipv6_networks[1])
         self.create_interface(vm['id'], ipv6_port['id'])
-        waiters.wait_for_interface_status(
+        ip.wait_for_interface_status(
             self.os_primary.interfaces_client, vm['id'],
-            ipv6_port['id'], lib_constants.PORT_STATUS_ACTIVE)
+            ipv6_port['id'], lib_constants.PORT_STATUS_ACTIVE,
+            ssh_client=ssh_client, mac_address=ipv6_port['mac_address'])
         self._test_ipv6_address_configured(ssh_client, vm, ipv6_port)
 
     @decorators.idempotent_id('b13e5408-5250-4a42-8e46-6996ce613e91')