Update prepare_setWorkplace.sh file.
    
    - Previously, when printing the action message related to deleting the
      current workplace, the option --as-removing-line was used. This
      update is not recognized by tcar_printMessage function. This update
      changes prepare_setWorkplace.sh to use --as-deleting-line, instead.
    
    - Previously, when the prepare_setRenderEnvironment function was
      called, an absolute path was used. Since the absolute path is
      outside the CentOS Artwork Repository, it is considered a relative
      path of it and image rendition fails with a "doesn't exist" error
      message.  This update changes prepare_setWorkplace.sh to remove the
      absolute part of the path passed to prepare_setRenderEnvironment and
      use the relative part of it, only.