* Simplify maxcube integration
Device objects returned by maxcube-api dependency are stable, so
we do not need to resolve from the device address every time.
Also, refactor and unify how maxcube integration sets temperature & mode.
* Add tests for maxcube component
* Use homeassistant.util.utcnow to retrieve current time
* Revert "Simplify maxcube integration"
This reverts commit 84d231d5bd.
* Make test pass again after rolling back integration changes
