Support nanosecond timestamps in the csv parser

[gsalcedo-itx]

Feature Request

Opening a feature request kicks off a discussion.

Proposal:

[[inputs.file]]
files =["/test/events-detail"]
data_format = “csv”
csv_header_row_count =1
csv_delimiter = “|”
csv_trim_space = true
csv_timestamp_column = “Timestamp”
csv_timestamp_format = “unix”

Jan 17 14:05:20 tl-rhel-74 telegraf[2469]: 2019-01-17T19:05:20Z E! [inputs.file]: Error in plugin: parsing time “131922246173139818” as “unix”: cannot parse “131922246173139818” as “unix”

Current behavior:

Desired behavior:

Use case: [Why is this important (helps with prioritizing requests)]