Update some test capture files

Update some test capture files

These changes avoid some pcap_loop() errors messages like:
"tcpdump: pcap_loop: invalid packet capture length X, bigger than
snaplen of Y"
or
"tcpdump: pcap_loop: truncated dump file; tried to read X header
bytes, only got Y"

Update the output of the tests accordingly (no more "EXIT CODE" line).

Remove the no more useful .out.stderr files.