Change datatype for HVAC temeprature

[SebastianSchildt]

It was defined as int, most cars are drive have 0.5°C steps to set temperature, which can not be mapped to the current VSS model.

Changing this to float in the model fixed it, and then it is up to an app/user to represent this with a lower granularity if requried.

[SebastianSchildt]

Meeting Notes 8/23

• are datatype changes for major release only?
• see also Process for handling major and minor changes #634
• before merge we need to decide whether "master" is running towards 5.0 now, do we need a 4.x branch as well?

[erikbosch]

I would say that a datatype change in most cases shall be considered as a backward incompatible changeIf a client use a signal with float type then it is reasonable that the server also handles it as a float type.

[erikbosch]

Meeting notes:

• OK to merge from content perspective
• Shall be for the next "major release", await merging until minor/major process clarified

[erikbosch]

Merging to master, shall not be included in 4.X (and this v4.1 release)