8153039: Command line processing should use mtCommand or mtArguments rather than mtInternal for NMT Summary: Added mtArguments and replaced argument related usages of mtInternal with the new flag. Reviewed-by: coleenp, gtriantafill

^build/
^dist/
nbproject/private/
^webrev
^.hgtip
^.bridge2
^.jib/
.DS_Store
.metadata/
.recommenders/