Hue Groups being imported when configured not to

[edif30]

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**Home Assistant release (hass --version):0.65.4

**Python release (python3 --version):3.6.4

**Component/platform: Hue

Description of problem:
Hue Groups are being imported even though the configuration is set to now allow.

Expected:
No Hue groups imported into HA

Problem-relevant configuration.yaml entries and steps to reproduce:

hue:
  bridges:
    - host: !secret hue_host
    - allow_unreachable: true
    - allow_hue_groups: false

Traceback (if applicable):

Additional info:
This used to work as far as I can remember.

[balloob]

Will be fixed in #13043