Use $ for list arg passed in to builtIn kw

Use $ for list arg passed in to builtIn kw

If a list is passed in with the @ syntax, it's expanded first
the first two elements are used for the BuiltIn keyword. So
the result is not what we expect. I noticed it in this false
failure:

https://logs.opendaylight.org/releng/vex-yul-odl-jenkins-1/netvirt-csit-1node-1cmb-0ctl-0cmp-openstack-queens-upstream-stateful-snat-conntrack-fluorine/154/robot-plugin/log_full.html.gz#s1-s11-k1-k2-k6-k5

it needs to come in with the $ syntax so the keyword can
use it internally to loop over, and compare to the 2nd
argument.

Change-Id: Iea8cda9f8f7357cac3399cf7756822cc743cc6cd
Signed-off-by: Jamo Luhrsen <jluhrsen@redhat.com>