TC-CC-6.5: Automate

[cecille]

Relevant other issue #375

This will need to be swapped over to python because even though we can check the StartUpColorTemperatureMireds, it can't be used in the next command because None != null. This already has python bits in it, let's just bite the bullet and do it properly

current test: https://github.com/project-chip/connectedhomeip/blob/master/src/app/tests/suites/certification/Test_TC_CC_6_5.yaml

test plan doc:
https://github.com/CHIP-Specifications/chip-test-plans/blob/master/src/cluster/colorcontrol.adoc