Turn on Telemetry

[ric-evans]

Turning on telemetry is straightforward. It's already an extra dependency for wipac-rest-tools (wipac-rest-tools[telemetry]). We won't want to enable telemetry by default so any clients (those that treat iceprod as a pip package) can decide for themselves, so let's add an extra dependency "telemetry":

[options.extras_require]
...
telemetry =
	wipac-rest-tools[telemetry]

For running iceprod as an application, we'll want to install iceprod as pip install iceprod[telemetry] (or pip install .[telemetry]) in the Dockerfile.

The telemetry environment variables will also need to be set to enable communication to the telemetry server. Without these set, telemetry will be silently bypassed.