[config] Add check in config interface ip command to block if the interface is portchannel member (#2539)

- What I did
Added a check in config interface ip command to block if the interface is portchannel member

- How I did it
Added check in config handling

- How to verify it
Added UT to verify.

Author: dgsudharsan

config/main.py

@@ -4223,6 +4223,12 @@ def add(ctx, interface_name, ip_addr, gw):
         click.echo("Interface {} is a member of vlan\nAborting!".format(interface_name))
         return
 
+    portchannel_member_table = config_db.get_table('PORTCHANNEL_MEMBER')
+
+    if interface_is_in_portchannel(portchannel_member_table, interface_name):
+        ctx.fail("{} is configured as a member of portchannel."
+                .format(interface_name))
+
     try:
         ip_address = ipaddress.ip_interface(ip_addr)
     except ValueError as err:

tests/ip_config_test.py

@@ -111,6 +111,18 @@ def test_add_interface_ipv4_with_leading_zeros(self):
         assert result.exit_code != 0
         assert ERROR_MSG in result.output
 
+    def test_ip_add_on_interface_which_is_member_of_portchannel(self):
+        runner = CliRunner()
+        db = Db()
+        obj = {'config_db':db.cfgdb}
+
+        # config int ip add Ethernet32 100.10.10.1/24
+        result = runner.invoke(config.config.commands["interface"].commands["ip"].commands["add"], ["Ethernet32", "100.10.10.1/24"], obj=obj)
+        assert result.exit_code != 0
+        print(result.output)
+        print(result.exit_code)
+        assert 'Error: Ethernet32 is configured as a member of portchannel.' in result.output
+
     '''  Tests for IPv6 '''
 
     def test_add_del_interface_valid_ipv6(self):