Update error translation. Some exception was not translated, based on how the...

Update error translation. Some exception was not translated, based on how the translation works in RASP.
Move NUnit to nuget - so it works out-of-the-box.

git-svn-id: file:///svnrepo/openebusiness/dk.gov.oiosi/common@34129 4e58de57-8926-0410-947e-8945c843cdd7