US1339, Fastre-route for ISIS interafce address family

[swarudka]

Unable to configure below attributes through terraform

  # - yang_name: fast-reroute/computation/levels/level
  #   tf_name: fast_reroute_per_prefix
  #   type: List
  #   attributes:
  #     - yang_name: level-id
  #       id: true
  #       example: 2