Update affected client tests.
Add get_full_api_url util function and update affected code to use it.
Add __all__.
Generate temporary token and pass it to the sensor wrapper process.
Hook up methods for talking to the datastore in the SensorService.
Also register api options in the sensor container process so we can also access
API settings there.
Fix a typo, add docstrings.
Add constans and update affected code.
Fix constant value.
Don't include trailing slash.
Remove obsolete todo notes.
Remove code which is not needed.
Update affected tests (sensor_wrapper already registers the options).
Add more todo annotations.