Change to do LPM check while looking up a route from Floating-IP
- prefer local route over route from Floating-IP if LPM match
  against local route.
- prefer Floating-IP over local route for same prefix length
- prefer Floating-IP fip1 over fip2 based on vrf_name and addr.
Merge pull request #598 from Juniper/psethi_bugs

Change to do LPM check while looking up a route from Floating-IP