Fix for zwave RGB light setting

[emlove]

Description:

I was able to reproduce this with my Aeotec ZW098 bulb as well. I'm guessing this was broken as part of #6445, since we used to be going through a helper method. We can now just use python strings instead of byte strings.

Related issue (if applicable): fixes #7125

See Also: https://community.home-assistant.io/t/z-wave-rgb-broken-after-last-update/15777/9

[mention-bot]

@armills, thanks for your PR! By analyzing the history of the files in this pull request, we identified @balloob, @leoc and @fabaff to be potential reviewers.

[balloob]

Cherry-picked for 0.42.4

[thundergreen]

Morning all. After upgrading to 0.42.4 I cant chose rgb color for z wave anymore. I can turn it on but color picker wont react to my input. Also my Automations which include a certain color won*t turn on my LED strip attached to Z-Wave Fibaro RGBW controller. Is there any help out there ?

[emlove]

@thundergreen
OK, your research in chat is correct. The python-openzwave v0.3.3 update is what broke this. (I was pretty sure I had tested it with #6445.) I use docker, so I got automatically updated and it broke for me. (Guessing @bboti86 is also on docker.)

I think we'll be best off just having v0.3.3 be the minimum supported version.