* Alexa temperature adjustment handle multiple setpoint
In "auto" mode with many thermostats, the thermostats expose both an
upper and lower setpoint representing a range of temperatures. When a
temperature delta is sent from Alexa (e.g. "lower by 2 degrees), we need
to handle the case where the temperature property is not set, but
instead the upper and lower setpoint properties are set. In this case,
we adjust those properties via service call instead of the singular
value.
* Updating tests to fix coverage
44aa531a51