vacuum.py: set unique_id

[stek29]

fix #17

[AlexxIT]

There is no point in taking hash from name if we use name in unique_id anyway.

[stek29]

There is no point in taking hash from name if we use name in unique_id anyway.

What if there are “Bathroom” and “bathroom”? The ID goes through slugify.

[AlexxIT]

In both cases, the ID will already be unique.

[stek29]

@AlexxIT

>>> from homeassistant.util import slugify
>>> slugify('living-room') == slugify('living_room')
True
>>> slugify('Bathroom') == slugify('bathroom')
True