fix(influxdb): add API token capability to InfluxDB

[belldina]

Added plumbing to read apiKey from Kayenta InfluxDB and wire it to a "Token " auth header for InfluxDB API requests.
Understood that it's not elegant to simply append more args to the createClient method, but that whole piece needs a rewrite to account for various auth methods, so I'm simply tacking on for now.

[spinnakerbot]

The following commits need their title changed:

• ee352ee: Add api token capability to InfluxDB, and fix

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[belldina]

squashed and reformatted

[belldina]

is there anything else on my side that needs to be done? I've squashed all commits and reformatted the commit title.

[belldina]

updated the PR title to match the requests commit title format.