This upgrades the flux version to v0.50.2.
The secret service, which is used for alerts, is not included. The
`to()` function is also still not included.
This integrates the influxdb 1.x series to the latest version of Flux
and updates the code to use it. It also removes the dependency on
platform and copies the necessary code from storage into the 1.x series
so the dependency is unneeded.
The flux functions specific to 1.x have been moved to the same structure
that flux changed to with having a `stdlib` directory instead of a
`functions` directory. It also adds a `databases()` function that
returns the databases from the meta client.
Sam Arnold
Dane Strandboge
Jonathan A. Sternberg