Previously the rest of the graph was in "bps", as indicated in the
legend, however the unit for the totals is "B" (bytes) - as only
the prefix (M, G, T) was shown for the totals it was not clear that
the unit was different.
Previously this function would output invalid SQL as a logical
operator would be included after every condition. This change
removes the final logical operator so the SQL is valid.
For example, previously the single rule:
`bgpPeers.bgpPeerRemoteAs = "6939" &&"`
Would generate:
```
SELECT DISTINCT(bgpPeers.device_id) FROM bgpPeers WHERE device_id=? && (bgpPeers.bgpPeerRemoteAs = "6939" &&) LIMIT 1
```
This changes means it will generate:
```
SELECT DISTINCT(bgpPeers.device_id) FROM bgpPeers WHERE device_id=? && (bgpPeers.bgpPeerRemoteAs = "6939") LIMIT 1
```
Thom Seddon