[autotest] Change cautotest-mysql to IP of cautotest-mysql.

This dodges flakey DNS lookups.  It also bypasses the niceities of
having a layer of indirection, given that our IPs changing hasn't been
entirely infrequent.  This is just a workaround until the reason for the
DNS lookup flake has been found and fixed.

BUG=chromium-os:38773
TEST=None

Change-Id: I9192f2faef83db3e27d478cc61d321a0f9fad3d3
Reviewed-on: https://gerrit.chromium.org/gerrit/43813
Tested-by: Alex Miller <milleral@chromium.org>
Reviewed-by: Simran Basi <sbasi@chromium.org>
Commit-Queue: Alex Miller <milleral@chromium.org>
1 file changed