Incorrect LPSTAT_PATTERN with french locale

[Jef Mathiot]

The `/usr/share/hplip/base/queues.py` Python script uses the `lpstat -v` command to list CUPS printers registered on the system.

The issue is that the lpstat utility, when used with a french locale, adds an extra space in the output before the colon :

```
matériel pour HP_Smart_Tank_Plus_550_series_XXXXXX_ : implicitclass://HP_Smart_Tank_Plus_550_series_XXXXXX_/
matériel pour Smart_Tank_Plus_550 : hp:/net/Smart_Tank_Plus_550_series?ip=XXX.XXX.XXX.XXX
```

Hence the discovery of CUPS printers on french-locale (and possibly other locales as well) systems is completely broken.

Fix (HPLIP 3.22.2 on an Ubuntu 20.04 box):

Replace the line 54 of queues.py with:

```
LPSTAT_PATTERN = re.compile(r"""(\S*)(\s)?: (.*)""", re.IGNORECASE)
```