Sort using the default temp location

Not sure what motivated this (maybe running out of space in the default
temp location) but sorting in the default application working directory
won't work now because of the way permissions are set in the
application.

lib/scrub/chunker.rb

@@ -39,7 +39,6 @@ def validate
     def run
       # First we need to get all the data from @glob into one file.
       # `split --number=l/x` only works on files, not on STDIN.
-      # TODO: we might want another dir for sort -T .
       tmp_file = File.join(@tmp_chunk_dir, "tmp_sorted.txt")
       add_uuid_call = @add_uuid ? "| bundle exec ruby bin/add_uuid.rb" : ""
       # Sort call explained:
@@ -50,7 +49,7 @@ def run
       # -n    = numeric sort so [1, 3, 20] instead of [1, 20, 3]
       # -T ./ = put temporary files in the current directory
       sort_call = "egrep -vh '^OCN' #{@glob} | " \
-                  "sort -t: -k2,2 -s -n -T ./ " \
+                  "sort -t: -k2,2 -s -n" \
                   "#{add_uuid_call} " \
                   "> #{tmp_file}"
       Services.logger.info sort_call