routing: T3211: Add redistribute protocol IS-IS to bgp ospf rip

[sever-sever]

Change Summary

Add option for redistribute protocol IS-IS to bgp/ospf/rip

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Migration from an old Vyatta component to vyos-1x, please link to related PR inside obsoleted component
• Other (please describe):

Related Task(s)

T3211

Component(s) name

routing, bgp, ospf, rip, isis

Proposed changes

How to test

VyOS configuration:

set protocols bgp 65530 address-family ipv4-unicast redistribute isis
set protocols bgp 65530 neighbor 100.64.0.2 remote-as '65002'
set protocols ospf redistribute isis
set protocols rip interface eth1
set protocols rip redistribute isis

It should generate the next FRR configuration:

!
router rip
 network eth1
 redistribute isis
!
router bgp 65530
 no bgp ebgp-requires-policy
 no bgp network import-check
 neighbor 100.64.0.2 remote-as 65002
 !
 address-family ipv4 unicast
  redistribute isis
 exit-address-family
!
router ospf
 auto-cost reference-bandwidth 100
 timers throttle spf 200 1000 10000
 redistribute isis
!

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly

[c-po]

Please also extend the individual protocols smoketests by adding ISIS.

Example for BGP: https://github.com/vyos/vyos-1x/blob/current/smoketest/scripts/cli/test_protocols_bgp.py#L390-L391 but there is also a test for OSPF...

[sever-sever]

Please also extend the individual protocols smoketests by adding ISIS.

Done