Add new env to enable LXD on gate
Specify new env on LXD gate which will be used by plugin.sh/gate hook to enable
nova-lxd and create proper image to be used.
export DEVSTACK_GATE_NEUTRON=1
export DEVSTACK_GATE_INSTALL_TESTONLY=1
export BRANCH_OVERRIDE={branch-override}
+ export OCTAVIA_USE_LXD=true
if [ "$BRANCH_OVERRIDE" != "default" ] ; then
export OVERRIDE_ZUUL_BRANCH=$BRANCH_OVERRIDE
fi
