netlink_listener_test deflake - again...

Reduce to 32500 sockets, since ulimit is set to 32768 open fds.

While at it fix up some comments, and do an earlier abort (but still fail)
to ease debugging if opening of sockets fails.
(otherwise you get tens of thousands of expect failures)

Test: built, ran atest
Bug: 144135648
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I5244953c553ac46432af80010e7acb9414926afd
Merged-In: I5244953c553ac46432af80010e7acb9414926afd
(cherry picked from commit 728695794babd7a6b09ae7c2c5667db3b6cf91e4)
1 file changed