Compound UPS Statuses not reflecting in metrics

[sshaikh]

For example both:

ups.status: OL

and

ups.status: OL DISCHRG

Give a status of 3, which is especially concerning given the second one means there's no input voltage.

Either we need more status codes, or status has to be a compound number, or we prioritise the strings found (eg give the second one an 11).