Remove bogus // in example ccn uri in NameConventions.txt
Remove bogus // in example ccn uri in NameConventions.txt

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