FRRouting (FRR): Installation on routers and activation at boot

Summary:
FRRouting should be installed based on T2208, with OSPF support.

Ref T2303

Test Plan:

• salt 'router-002' state.apply roles/router
• salt 'router-003' state.apply roles/router

Reviewers: dereckson, Duranzed

Reviewed By: dereckson

Subscribers: Duranzed, dereckson

Maniphest Tasks: T2303

Differential Revision: https://devcentral.nasqueron.org/D4055