* Initialize machine information before Sentry
* Set user and machine for all reports
Now that we initialize machine earlier we can report user and machine
for all events, even before Supervisor is completely initialized.
Also use the new tag format which is a dictionary.
Note that it seems that with the current Sentry SDK version the
AioHttpIntegration no longer sets the URL as a tag. So sanitation is
no longer reuqired.
* Update pytests
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