influxdb_memstats measurement named "gcc_pu_fraction"

[clone137]

Relevant telegraf.conf:

[[inputs.influxdb]]

System info:

Telegraf 1.14.2 (git: HEAD fb74eaf)

FreeBSD 11.3-RELEASE-p5 #0: Tue Nov 12 08:59:04 UTC 2019 root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64

Steps to reproduce:

1. telegraf config:

[[inputs.influxdb]]
  urls = [ "http://localhost:8086/debug/vars" ]

[[outputs.influxdb]]
  urls = ["http://10.0.2.125:8086"]
  database = "telegrafInfluxdbTest"

2. run telegraf with above config:

$ telegraf --config telegrafInfluxdb.conf --test | grep gcc_pu_fraction
2020-05-20T09:20:40Z I! Starting Telegraf 1.14.2
> influxdb_memstats,host=dev-brad.irisns.com,url=http://localhost:8086/debug/vars alloc=155971040i,buck_hash_sys=2218019i,frees=2931264394i,gc_sys=24844288i,gcc_pu_fraction=0.0001339397761468312,heap_alloc=155971040i,heap_idle=428916736i,heap_inuse=173817856i,heap_objects=1930178i,heap_released=391634944i,heap_sys=602734592i,last_gc=1589966397087783430i,lookups=0i,mallocs=2933194572i,mcache_inuse=6944i,mcache_sys=16384i,mspan_inuse=1834504i,mspan_sys=5439488i,next_gc=274786240i,num_gc=22017i,other_sys=1581269i,pause_ns=65992i,pause_total_ns=2163186689i,stack_inuse=1245184i,stack_sys=1245184i,sys=638079224i,total_alloc=547834436504i 1589966440000000000

one of the fields produced is named "gcc_pu_fraction"

Expected behavior:

i expect the field to be named "gc_cpu_fraction"

Actual behavior:

the field is named "gcc_pu_fraction"

Additional info:

i found this same issue in the kapacitor input (issue #7402) for the golang memstats struct. therefore this issue may be present in others too.