Made it possible to have a value included in many group values

[likp]

There is a bug in the 2.4 version where you get an exception in MetaQuery see

PCAxis.Sql/PCAxis.Sql/QueryLib_24/MetaQuery.cs

Line 1279 in 157fb58

myOut.Add(outRow.ValueCode, outRow);

when you have a ValueCode that is in many groups which should be ok.

This PR checks change the dictionary to be a list of row instead of a single row and also checks if the key i already in the dictionary before trying to add it.

[JohannesFinsveen]

On the bug ( for when we revist this in the future :-) ):
When ValueGroup is queried with 1 parent code, the child codes will be unique.
When ValueGroup is queried with more than 1 parent code, the same child code can occur in rows where parent codes differ.

Our metadata editors have an instruction not to create groupings where 2 groups have the same child.
table 04321 has one such grouping (something with 2002). if you select Drammen and Skoger you get 500, not data :-)

[JohannesFinsveen]

LGTM

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[JohannesFinsveen]

👍