[UI - Telegrafs] Create telegraf transaction fails to create special label

[karel-rehor]

Steps to reproduce:
From the Load Data > Telegrafs page

1. Click Create Configuration
2. Choose a bucket and a plugin (Have been using Docker but issue also appears with others)
3. Click continue
4. Configure the plugin
5. Add a name and description
6. Click Create and Verify

Expected behavior:
If all values are correct expect to see a notification that the Configuration was Successfully saved

Actual behavior:
An error notification appears. "Failed to save configurations"
The console log shows

 POST http://localhost:9999/api/v2/labels 422 (Unprocessable Entity)

Which is also shown in the network log

Request URL: http://localhost:9999/api/v2/labels
Request Method: POST
Status Code: 422 Unprocessable Entity
Remote Address: [::1]:9999
Referrer Policy: no-referrer-when-downgrade

Payload sent looked like

{"orgID":"72548c12d87a9727","name":"@influxdata.token","properties":{"color":"#FFFFFF","description":"token for telegraf config: asdf","tokenID":"04b9730246697000"}}

Note that when creating labels directly there is no tokenID in the properties.

Also can click to another area of the UI and then return to Load Data > Telegrafs and the configuration is present.

Screencast

Environment info:

• System info: Run uname -srm and copy the output here

Linux 4.4.0-166-generic x86_64

• InfluxDB version: Run influxd version and copy the output here
  Working with nightly build docker image. From docker log:

ts=2019-11-04T08:41:47.008799Z lvl=info msg="Welcome to InfluxDB" log_id=0IuP4e00000 version=nightly commit=2d6d38179 build_date=2019-11-04T07:21:10Z

• Other relevant environment details: Container runtime, disk info, etc
  browser: Chrome 77

Config:
Copy any non-default config values here or attach the full config as a gist or file.
Started with e2e-testing enabled

--e2e-testing=true

[karel-rehor]

Looking at this issue a second time. This seems to be occurring only after the initial telegraf is created. In other words it occurs when creating a second or third telegraf.

latest build

ts=2019-11-13T08:54:53.420486Z lvl=info msg="Welcome to InfluxDB" log_id=0J4~P_w0000 version=nightly commit=f0ecc0e89 build_date=2019-11-13T07:27:37Z

[russorat]

To fix this, we need to remove the automatic token creation for telegraf configs in the ui, and add the ability for the user to select a token to use. We should show the list of tokens that have the right permissions. If no token exists, we should allow the user to create a new one (one click).

We should also run a migration to remove all the labels that "connect" the tokens to the telegraf configs