When there are multiple keepalived instances in same network space,
equal keepalived router-ids cause conflict (now default router-id number
is 100). So we have to specify keepalived's router_id for VRRP peering.
This commit make keepalived route-id configurable, so that we can
prevent keepalived conflict caused by default keepalived router-id.
Change-Id: Ia92a8b64205ab52ad15237e9fdeaacb61aae6400
9022c9237d