Fixed flakes (tested via --runs_per_test=100) and added skips for
not-yet-implemented features. Once submitted, the iptables tests will be
ready to enable in kokoro.
Enables commands such as:
$ iptables -A INPUT -d 127.0.0.1 -j ACCEPT
$ iptables -t nat -A PREROUTING ! -d 127.0.0.1 -j REDIRECT
Also adds a bunch of REDIRECT+destination tests.
Fix the indentation and print statements.
Moved the NAT redirect tests to new file.
Added negative test to check redirect rule on ports other than
redirected port.
gVisor bot
Kevin Krakauer
Nayana Bidari