Description
for t1 topology 'test_show_ip_route_v4, test_show_ip_route_v6 failing ' testcases failing.

Steps to reproduce the issue:

1. configure dut
2. Run the testcase

Describe the results you received:

self = <test_iface_namingmode.TestShowIP instance at 0x7f2d7b7d8518>, setup_config_mode = (<tests.common.devices.AnsibleHostBase object at 0x7f2d6fc4bad0>, 'default', 'default')
spine_ports = {'alias': ['TestAlias2', 'TestAlias4', 'TestAlias5', 'TestAlias7'], 'interface': ['Ethernet9', 'Ethernet3', 'Ethernet0', 'Ethernet6']}

def test_show_ip_route_v4(self, setup_config_mode, spine_ports):
    """
    Checks whether 'show ip route <ip>' lists the interface name as
    per the configured naming mode
    """
    dutHostGuest, mode, ifmode = setup_config_mode
    route = dutHostGuest.shell('SONIC_CLI_IFACE_MODE={} show ip route 192.168.1.1'.format(ifmode))['stdout']
    #route = dutHostGuest.shell('SONIC_CLI_IFACE_MODE={} show ip route'.format(ifmode))['stdout']
    logger.info('route:\n{}'.format(route))

    if mode == 'alias':
        for alias in spine_ports['alias']:

            assert re.search(r'via {}'.format(alias), route) is not None
    elif mode == 'default':
        for intf in spine_ports['interface']:

          assert re.search(r'via {}'.format(intf), route) is not None

E AssertionError

dutHostGuest = <tests.common.devices.AnsibleHostBase object at 0x7f2d6fc4bad0>
ifmode = 'default'
intf = 'Ethernet9'
mode = 'default'
route = u'Routing entry for 0.0.0.0/0\n Known via "kernel", distance 0, metric 0, best\n Last update 02:41:48 ago\n * 10.0.0.16, via enp12s0f1.2'
self = <test_iface_namingmode.TestShowIP instance at 0x7f2d7b7d8518>
setup_config_mode = (<tests.common.devices.AnsibleHostBase object at 0x7f2d6fc4bad0>, 'default', 'default')
spine_ports = {'alias': ['TestAlias2', 'TestAlias4', 'TestAlias5', 'TestAlias7'], 'interface': ['Ethernet9', 'Ethernet3', 'Ethernet0', 'Ethernet6']}

iface_namingmode/test_iface_namingmode.py:895: AssertionError
----------------------------------------------------------------------------------- generated xml file: /data/tests/logs/tr.x

Describe the results you expected:
should pass

Additional information you deem important:

**Output of `show version`:**

```
(paste your output here)
```

**Attach debug file `sudo generate_dump`:**

```
(paste your output here)
```