* RR client support in minigraph for FRR
* Fix python warning from previous rrclient commit and move config handling to a more relevant place for this cmd
* Add config support for nhopself, keepalive and holdtime timers.
* Add route-map to prefer global nexthops for ebgp learned prefixes.
Modify minigraph parser output format so it fit DB schema
Modify configuration templates to fit new schema
Systemd services dependencies are modified so database starts before any configuration consumer
- Extending SONiC building infrastructure to provide users
with greater flexibility, by allowing them to elect a
routing-stack different than the default one (quagga). The desired
routing-stack will be defined in rules/config file.
- As part of these changes I'm adding support for
Free-Range-Routing (FRR) stack. Quagga will continue to be
the default routing-stack.
Signed-off-by: Rodny Molina <rodny@linkedin.com>
