Openaire fix for multiple productionPlaces

[ffritze]

What this PR does / why we need it:

• The current openaire implementation cannot process multiple productionPlaces when preparing metadata for the geolocation.

Which issue(s) this PR closes:

• Closes #

Special notes for your reviewer:

Suggestions on how to test this:
Tests are written and adapted for this pull request. They are passing.

Does this PR introduce a user interface change? If mockups are available, please link/include them here:

Is there a release notes update needed for this change?:

Additional documentation:

[coveralls]

coverage: 22.763% (+0.01%) from 22.752%
when pulling e870fdd on TIK-NFL:openaire_fix
into 7283dbd on IQSS:develop.

[pdurbin]

multiple productionPlaces

Made multiple in this PR:

• Make productionPlace multiple, facetable, and enabled for Advanced Search #9253 #9254

[jggautier]

might be related:

• Export: OpenAIRE export format fails silently on more than one productionPlace (made multiple in recent pr) #9546