Add POI parcel locker (#1390)

closes #1370 

This PR adds a parcel locker to post class.

Similarly to ATMs from PR #1375 if a name is not present we try to use `brand` or `operator`. Here we also try to add `ref` to the brand or operator since it can disambiguate parcel lockers that are next to each other (which happens).

layers/poi/mapping.yaml

@@ -44,6 +44,7 @@ def_poi_mapping_amenity: &poi_mapping_amenity
   - pharmacy
   - place_of_worship
   - police
+  - parcel_locker
   - post_box
   - post_office
   - prison
@@ -353,6 +354,9 @@ def_poi_fields: &poi_fields
   - name: uic_ref
     key: uic_ref
     type: string
+  - name: ref
+    key: ref
+    type: string
   - name: religion
     key: religion
     type: string
@@ -374,6 +378,9 @@ def_poi_fields: &poi_fields
   - name: network
     key: network
     type: string
+  - name: brand
+    key: brand
+    type: string
 
 def_poi_mapping: &poi_mapping
   aerialway: *poi_mapping_aerialway