Fix common event header parsing

During JSON parsing we were using 3 times 'version' field. Replaced
parsing with protobuf parser to avoid mistakes like this in future

Change-Id: I6224dc6533ab553e7e2315a95567a1fa48c1c5ad
Issue-ID: DCAEGEN2-710
Signed-off-by: Filip Krzywka <filip.krzywka@nokia.com>
6 files changed