server: graphite show data on plot with a time period ending to referencence time

[pat1]

for example:

http://rmap.cc/graphite/render/?target=report_fixed.digiteco.1104278_4413417.*.254_0_0.103_2000_-_-.B12101&width=588&height=310&_salt=1514996915.997&from=13%3A30_20180101&until=14%3A30_20180101

in DB the missed data is at 14:00

with csv format:

 report_fixed.digiteco.1104278_4413417.fixed.254_0_0.103_2000_-_-.B12101 | 2018-01-01 13:30:00| 278.38
 report_fixed.digiteco.1104278_4413417.fixed.254_0_0.103_2000_-_-.B12101 | 2018-01-01 13:45:00| 
 report_fixed.digiteco.1104278_4413417.fixed.254_0_0.103_2000_-_-.B12101 | 2018-01-01 14:00:00| 277.89
 report_fixed.digiteco.1104278_4413417.fixed.254_0_0.103_2000_-_-.B12101 | 2018-01-01 14:15:00| 277.53
 report_fixed.digiteco.1104278_4413417.fixed.254_0_0.103_2000_-_-.B12101 | 2018-01-01 14:30:00|  

[pat1]

see at https://github.com/graphite-project/graphite-web/issues/1787 Will be better to shift data of one point so the timestamp will be to the end of period more conform to dballe specs. Remove the first point and not the last.

[pat1]

considerando che nel data model il reference time è il periodo di fine integrazione di tutte le elaborazioni statistiche l'attuale rappresentazione potrebbe anche considerata corretta.