Add 'Openbaarheid' fields to output

[droomelotdegendt]

Idea mentioned in: #133 (comment)
NOTE: Decide with end users if this issue (and all its subtasks) are necessary.

Tasks

• Add 'Openbaarheid' field(s) to the output of the get_locs function. This information is on observation well level, so an additional decision should be made if this information should be in- or excluded from the aggregated output (when obswells is FALSE).
• Add an additional argument to the get_locs function to exclude non public sampling points.

Background Info

The new DWH 'W0002_10_Watina' has a separate table DimOpenbaarheid with the following fields:

Kolom	Datatype	Beschrijving
OpenbaarheidWID	int	Technische ID warehouse
OpenbaarheidCode	nvarchar	Code voor de openbaarheid (PUBL, INCO, OWNCO, …)
OpenbaarheidBeschrijving	nvarchar	Beschrijving van de openbaarheid (volledige toegang, INBO contacteren, eigenaar contacteren, …)
OpenbaarheidSorteerVolgorde	int	Sorteervolgorde voor de openbaarheidscodes

The table looks like this:

OpenbaarheidWID	OpenbaarheidCode	OpenbaarheidBeschrijving	OpenbaarheidSorteerVolgorde
-2	-2	Ontbrekend	-1
-1	-1	Onbekend	-1
1	INCO	INBO te contacteren	4
2	NONE	Geen toegang	6
3	OWNCO	Eigenaar contacteren	5
4	PUBL	Volledige toegang	2

It can be joined to the table DimPeilpunt by OpenbaarheidWID.