Round latency values in 'Latest' display
Created by Peter Shawhan on March 30, 2017. Copied from redmine (https://bugs.ligo.org/redmine/issues/5407)
The 'Latest' query output includes latencies in seconds with six decimal places of precision. The decimal part is not even meaningful, because the insertion time is only recorded with a precision of one second. So I recommend changing the 'Latest' output format to give latencies rounded to integer seconds.