tests: Convert isis to use 1 and 10 for hello/multiplier

tests: Convert isis to use 1 and 10 for hello/multiplier

Current isis tests use a variety of hello timers as well
as hello-multiplier, let's modify all of the isis test
cases to use 1 and 10.  This cleans up some spurious test
failures I was seeing locally.  As an example without
these changes running isis_tilfa_topo1 2r6 times I would
see 5-10 test failures now I am seeing ~2 test failures.

In any event part of the problem was that some tests were
not fully converged when looking at them under heavy
system load.  Changing this to 1/10 gives us 10 chances
to see the incoming packet.

Signed-off-by: Donald Sharp <sharpd@nvidia.com>