prometheus-node-exporter-lua: fix hostapd_ubus_stations & hostapd_stations

prometheus-node-exporter-lua: fix hostapd_ubus_stations & hostapd_stations

hostapd exposes the `hostapd-auth` ubus object. In both
hostapd_ubus_stations.lua and hostapd_stations.lua this object is
incorrectly matched as if it were a wifi phy such as `hostapd.phy0-ap0`.
Using the literal period to find interfaces (^hostapd%.) instead of the
pattern-matching period (hostapd.) fixes this.

fix formatting consistency

Signed-off-by: Michael Payne <[email protected]>
[fix version conflict]
Signed-off-by: Etienne Champetier <[email protected]>