Huge ISY994 platform cleanup, fixes support for 5.0.10 firmware#11243

Merged

pvizeli merged 10 commits intohome-assistant:devfrom OverloadUT:fix-isy994-newest-firmware

Dec 26, 2017

+356-346

Commits on Dec 24, 2017

Explicitly check for attributes rather than catch AttributeError
OverloadUT
committed

Commits on Dec 26, 2017

Remove null checks on hass.data, as they are always null at this point
OverloadUT
committed