* Update frr to frr-7.0.1
* Fix a typo
* Set right permissions on /etc/frr
* Convert external file links from debian to Azure
* Revert python3 fix
* Build frr using more than 1 job
* Add SWIG as dependency for libswss-common
- use superviord to manage process in frr docker
- intro separated configuration mode for frr
- bring quagga configuration template to frr.
Signed-off-by: Guohan Lu <gulv@microsoft.com>