time formatting off in logs, need rounding

[mrjones-plip]

Some times I see log entries like this:

Processed dump [mon-01-abc](2018-08-01 20:35:00 +0000 UTC - 2018-08-01 20:37:59.243568+0000 UTC): 786155 lines in (1m22.55102154s) seconds!

We should:

1. not have seconds accuracy to 8 decimal positions, two will suffice ;)
2. remove the parentheses around the time
3. remove the word "seconds" as it is often wrong, like in this case