fix db name in intfutil

[lguohan]

Signed-off-by: Guohan Lu gulv@microsoft.com

- What I did

- How I did it

- How to verify it

admin@vlab-01:~$ show interfaces status Ethernet0
  Interface        Lanes    Speed    MTU         Alias    Oper    Admin    Type    Asym PFC
-----------  -----------  -------  -----  ------------  ------  -------  ------  ----------
  Ethernet0  25,26,27,28      40G   9100  fortyGigE0/0      up     down     N/A         off

- Previous command output (if the output of a command-line utility has changed)

- New command output (if the output of a command-line utility has changed)

-->

[kirankella]

There is already a PR submitted for this issue. #440

[lguohan]

thanks for pointing out.