Refs #100890  Change nametreetest to turn input strings into valid flatnames
Refs #100890  Change nametreetest to turn input strings into valid flatnames

This will keep working in case nametree starts to depend on having valid flatnames,

svartika/ccnx,svartika/ccnx,svartika/ccnx,svartika/ccnx,svartika/ccnx,svartika/ccnx,svartika/ccnx