bgpd: Remove redundant whitespace before printing the reason of the failed peer

bgpd: Remove redundant whitespace before printing the reason of the failed peer

Before:

```
Neighbor        EstdCnt DropCnt ResetTime Reason
127.0.0.1             0       0     never  Waiting for peer OPEN (n/a)
```

After:

```
Neighbor        EstdCnt DropCnt ResetTime Reason
127.0.0.1             0       0     never Waiting for peer OPEN (n/a)
```

Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>