network: Fix logic in showing IP6 route metric.

The logic was inverted and ensured the value was always <= 0.
9 jobs for master in 4 minutes and 31 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #845575
build

00:01:29

 
  Test
passed #845577
coverage

00:02:33

passed #845576
test

00:01:10

 
  Manual
manual #845578
privileged allowed to fail manual
asan
manual #845581
allowed to fail manual
msan
manual #845579
allowed to fail manual
tsan
manual #845580
allowed to fail manual
ubsan
 
  Deploy
passed #845582
pages

00:00:28

failed pages:deploy

00:00:00