BUG-1849 Check for duplicate required sources and exclude all redundant

Also check for source identifier mismatch

Change-Id: I32fc76a56fd7adb564b7b9c9fc2679c5f36069cb
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>
Merge "BUG-1849 Check for duplicate required sources and exclude all redundant"