Many of the examples provided within documentation are using a single
dash for the command line arguments, but the telegraf executable
explicitly has two dashes.
There are also some inconsistencies with the ordering of the command
line argument examples. I've ordered them so that the examples will
show: config, config-directory, input-filter, test
* plugins/input/consul: moved check_id from regular fields to tags.
When service has more than one check sending data for both would overwrite each other
resulting only in one check being written (the last one). Adding check_id as a tag
ensures we will get info for all unique checks per service.
* plugins/inputs/consul: updated tests
Marcelo Almeida
Leszek Charkiewicz
Daniel Nelson
Lukasz Jagiello
Zack Zatkin-Gold
John Engelman
Łukasz Harasimowicz