Enhancement: Throw error during failed directory creation

[mjutras-mitre]

The "directory" which was passed as an input parameter is used to create the directory. In the call to dir.create, showWarnings=FALSE. This will suppress any errors during creation unless there were previous checks to ensure no illegal characters etc...

InSilicoVA/InSilicoVA/R/insilico_core.r

Line 88 in 7f5169a

dir.create(dir_err, showWarnings = FALSE)