autotest: Fix autotest linter warnings in site_linux_router

These warnings are both annoying and lead committers to skip the linter
rather than fix old code.  Fix the warnings once and for all.

TEST=network_WiFi_SimpleConnect/control.check11b passes, indicating the
file is still syntactically correct.
BUG=None.

Change-Id: Ib1847683624ec1e9ece0e4b3faf159b1901e481f
Reviewed-on: https://gerrit.chromium.org/gerrit/48666
Tested-by: Christopher Wiley <wiley@chromium.org>
Reviewed-by: Paul Stewart <pstew@chromium.org>
Commit-Queue: Christopher Wiley <wiley@chromium.org>
1 file changed