1. Store router-external in create and update (in DB)
2. Added a function to query vn’s with “router-external” flag set.
3. Fix for access of context.
4. Set the router-external flag in net-show using this flag from DB rather checking _fip_pool_ref_networks
fixes to get_networks
Merge pull request #21 from Juniper/router_ext

1. Store router-external in create and update (in DB)