route_check - get ROUTE_TABLE content fail - patch

[inspurSDN]

Root Cause:
    1. Not all /128 routes can be removed and should be treated as special

Solution:
    1. only remove /128 when tbl.get(k)[0] == False

What I did

How I did it

How to verify it

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)