Now that the database paths use UUIDs instead of names+generation ids,
and that IoxObjectStore checks there are no files in a directory before
it'll create a database directory (and has tests for that).
Running a server is now using `influxdb_iox run MODE [args]`, e.g.
`influxdb_iox run query --server-id 1`. Another mode that will follow
soon is `router`.
The old syntax `influxdb_iox run [args]` (w/o the mode part) is still
supported but a deprecation note will be printed.
Carol (Nichols || Goulding)
Marco Neumann