DUT mgmt interface does not get v4 IP address

[wendani]

Description

on msn2700-22, workaround is to put ipv4 config ahead of ipv6

#1544

Steps to reproduce the issue:
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Describe the results you received:

Describe the results you expected:

Additional information you deem important (e.g. issue happens only occasionally):

**Output of `show version`:**

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

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[lguohan]

addressed in #1701