Refs #100878  Cope with a missing xmllint command, in case the environment is spartan.
Refs #100878  Cope with a missing xmllint command, in case the environment is spartan.

svartika/ccnx,svartika/ccnx,cawka/ndnx,cawka/ndnx,svartika/ccnx,svartika/ccnx,svartika/ccnx,svartika/ccnx,cawka/ndnx,cawka/ndnx,svartika/ccnx,cawka/ndnx