#3716 Houdini Paths

Fixes UNC issue (ie: \\server\path) with path for houdini. The fix is to convert path to a format Houdini reads correctly. Otherwise, houdini was strips all prefix '\' to a single '\' which creates an error with paths starting with '\\'.
Would be great if you could add the description of the pull request as a comment to the code to 
explain the use case we are covering!