This change modifies the os-vif ovs plugin to set a default
tc qdisc on ovs interface when the host os is not windows
and the system datapath is used.
This change fixes a "silent" bug in the functional test code due
to a change in an ovsdbapp function signiture to accpet a new paramater.
Closes-Bug: #2017868
Change-Id: Id9ef7074634a0f23d67a4401fa8fca363b51bb43
c0d101aa81