connectivity: Iterate over each Entry in a Map & Enhanced for-loops

Change-Id: Id4a340584fc727058f6e37c1f0d3c5887e931417
Reviewed-on: https://gerrit.libreoffice.org/11917
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>
Tested-by: Noel Grandin <noelgrandin@gmail.com>