Disable InsecureRequestWarnings for telemetry requests

[jo-basevi]

For telemetry we are using a persistent session on Gadi to forward post requests to the ACCESS-NRI services django instance. With the current setup, it requires verify=False to be set in request.post() to the persistent session, however this raises a warning:

</path/to/env>/site-packages/urllib3/connectionpool.py:1097: InsecureRequestWarning: Unverified HTTPS request is being made to host '<persistent-session-name>.ps.gadi.nci.org.au'. Adding certificate verification is strongly advised. See: https://urllib3.readthedocs.io/en/latest/advanced-usage.html#tls-warnings

A fix to this with persistent session sending the correct host might be complicated, or not quite possible on NCI (see https://unix.stackexchange.com/questions/426542/how-to-make-ssh-port-fowarding-for-https)

[coveralls]

coverage: 60.384% (+0.2%) from 60.21%
when pulling 2c8c168 on ACCESS-NRI:telemetry-silence-warning
into 33045e5 on payu-org:master.