Change test_final_teardown to leave ccnd on "default" port alone, unless gentler cleanup attempts fail.
Change test_final_teardown to leave ccnd on "default" port alone, unless gentler cleanup attempts fail.

svartika/ccnx,cawka/ndnx,ebollens/ccnmp,svartika/ccnx,svartika/ccnx,cawka/ndnx,cawka/ndnx,cawka/ndnx,cawka/ndnx,ebollens/ccnmp,ebollens/ccnmp,svartika/ccnx,svartika/ccnx,ebollens/ccnmp,svartika/ccnx,svartika/ccnx