Changed clean_tmp_directory message (refs #3634)

Changed from "Clean tmp directory" to "Remove extracted temporary files
after restore".
Corrected `$clean_tmp_directory` type mixup (closes #3634)
Cleanup archived-context/archived-tmp content before restoration (refs #3634)
Merge pull request #78 from eguaj/1.4-A3634

1.4 a3634