The click CLI (`config ...`, `show ...`) are not VRF aware

[bluecmd]

The click CLI tools fail to connect to the API service if they are launched in another VRF than default or mgmt.

E.g:

(vrf:VrfMainframe)bluecmd@adele:~$ show ip
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/dist-packages/redis/connection.py", line 559, in connect
    sock = self._connect()
  File "/usr/local/lib/python3.7/dist-packages/redis/connection.py", line 615, in _connect
    raise err
  File "/usr/local/lib/python3.7/dist-packages/redis/connection.py", line 603, in _connect
    sock.connect(socket_address)
TimeoutError: [Errno 110] Connection timed out

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/bin/show", line 5, in <module>
    from show.main import cli
  File "/usr/local/lib/python3.7/dist-packages/show/main.py", line 9, in <module>
    import utilities_common.cli as clicommon
  File "/usr/local/lib/python3.7/dist-packages/utilities_common/cli.py", line 183, in <module>
    iface_alias_converter = InterfaceAliasConverter()
  File "/usr/local/lib/python3.7/dist-packages/utilities_common/cli.py", line 121, in __init__
    self.port_dict = multi_asic.get_port_table()
  File "/usr/local/lib/python3.7/dist-packages/sonic_py_common/multi_asic.py", line 262, in get_port_table
    ports = get_port_table_for_asic(ns)
  File "/usr/local/lib/python3.7/dist-packages/sonic_py_common/multi_asic.py", line 276, in get_port_table_for_asic
    config_db = connect_config_db_for_ns(namespace)
  File "/usr/local/lib/python3.7/dist-packages/sonic_py_common/multi_asic.py", line 44, in connect_config_db_for_ns
    config_db.connect()
  File "/usr/local/lib/python3.7/dist-packages/swsssdk/configdb.py", line 79, in connect
    self.db_connect('CONFIG_DB', wait_for_init, retry_on)
  File "/usr/local/lib/python3.7/dist-packages/swsssdk/configdb.py", line 74, in db_connect
    SonicV2Connector.connect(self, self.db_name, retry_on)
  File "/usr/local/lib/python3.7/dist-packages/swsssdk/dbconnector.py", line 264, in connect
    self.dbintf.connect(db_id, db_name, retry_on)
  File "/usr/local/lib/python3.7/dist-packages/swsssdk/interface.py", line 175, in connect
    self._onetime_connect(db_id, db_name)
  File "/usr/local/lib/python3.7/dist-packages/swsssdk/interface.py", line 192, in _onetime_connect
    client.config_set('notify-keyspace-events', self.KEYSPACE_EVENTS)
  File "/usr/local/lib/python3.7/dist-packages/redis/client.py", line 1243, in config_set
    return self.execute_command('CONFIG SET', name, value)
  File "/usr/local/lib/python3.7/dist-packages/redis/client.py", line 898, in execute_command
    conn = self.connection or pool.get_connection(command_name, **options)
  File "/usr/local/lib/python3.7/dist-packages/redis/connection.py", line 1192, in get_connection
    connection.connect()
  File "/usr/local/lib/python3.7/dist-packages/redis/connection.py", line 563, in connect
    raise ConnectionError(self._error_message(e))
redis.exceptions.ConnectionError: Error 110 connecting to 127.0.0.1:6379. Connection timed out.