Fix bgp_gr_helper and iface_loopback action failure du to config_db c…

…hange

The PR#13660 removed the 'members' key in "PORTCHANNEL" in config_db.json, need to align the test

tests/bgp/test_bgp_gr_helper.py

@@ -104,7 +104,7 @@ def _verify_prefix_counters_from_neighbor_after_graceful_restart(duthost, bgp_ne
 
     config_facts = duthost.config_facts(host=duthost.hostname, source="running")['ansible_facts']
     bgp_neighbors = config_facts.get('BGP_NEIGHBOR', {})
-    portchannels = config_facts.get('PORTCHANNEL_MEMBER', {})
+    portchannels_memebers = config_facts.get('PORTCHANNEL_MEMBER', {})
     dev_nbrs = config_facts.get('DEVICE_NEIGHBOR', {})
     configurations = tbinfo['topo']['properties']['configuration_properties']
     exabgp_ips = [configurations['common']['nhipv4'], configurations['common']['nhipv6']]
@@ -130,7 +130,7 @@ def _verify_prefix_counters_from_neighbor_after_graceful_restart(duthost, bgp_ne
     # get neighbor device connected ports
     nbr_ports = []
     if test_interface.startswith("PortChannel"):
-        for member in portchannels[test_interface].keys():
+        for member in portchannels_memebers[test_interface].keys():
             nbr_ports.append(dev_nbrs[member]['port'])
         test_neighbor_name = dev_nbrs[member]['name']
     else:

tests/iface_loopback_action/iface_loopback_action_helper.py

@@ -144,7 +144,7 @@ def get_portchannel_of_port(config_facts, port):
     """
     portchannels = config_facts['PORTCHANNEL'].keys() if 'PORTCHANNEL' in config_facts else []
     for portchannel in portchannels:
-        portchannel_members = config_facts['PORTCHANNEL'][portchannel].get('members')
+        portchannel_members = config_facts['PORTCHANNEL_MEMBER'][portchannel].keys()
         if port in portchannel_members:
             return portchannel