zebra: Send more OPAQUE data from BGP

zebra: Send more OPAQUE data from BGP

This includes community and large-community data.

```
exit1-debian-9# show ip route 172.16.16.1/32
Routing entry for 172.16.16.1/32
  Known via "bgp", distance 20, metric 0, best
  Last update 00:00:23 ago
  * 192.168.0.2, via eth1, weight 1
    AS-Path          : 65030
    Communities      : 65001:1 65001:2 65001:3 65001:4 65001:5 65001:6
    Large-Communities: 65001:123:1 65001:123:2
```

Signed-off-by: Donatas Abraitis <donatas.abraitis@gmail.com>