Test telemetry

[jrieken]

• @seanmcbreen

Once again telemetry has undergone some refactorings, esp to fix #1000. The appending of events now happens inside the shared process such that DNS issues don't block the main thread anymore. We should validate that

• we still send the common properties, like isNewSession, timestamp etc etc
• we still send the common properties using the same data types, like timesincesessionstart is a number, timestamp is a string
• we don't miss events on shutdown
• we still honour the opt out setting

[jrieken]

@seanmcbreen fyi master of telemetry data

[weinand]

@seanmcbreen Joh mentioned that you've already verified this. If this is correct please set your checkbox and close this item.