Added autosample_duration to InstrumentDeviceComputedAttributes for use in InstrumentDeviceExtension

* Bumps ion defs
* Implements get_autosample_duration() and get_uptime(). These values are filled after querying the events db.
* Basic integration test code added to check that the autosample_duration and uptime attributes are indeed getting computed and added to the extended resource for instrument device (InstrumentDeviceExtension) and that they are of the correct type.