Files in "tmp" should not be too large resp. removed

[dr0i]

There is one really big file in tmp:

~/git/metafacture-playground/tmp$ l -Shal |head
total 39G
-rw-r--r--  1 sol sol  39G Aug 22 09:55 metafix1405254507378886918.txt

We should somehow restrict log files to be too big.

[katauber]

This is no log file. It's result file of a workflow. But I don't understand why this isn't deleted after returning the result to the client. I will have a look what is going on there.

[katauber]

functional review: @dr0i
code review: @fsteeg

[katauber]

The files are not deleted at the moment.

@dr0i and I discussed offline, that we first need a mechanism to delete these files after a successful processed workflow and a configurable limit how big a file may be.

[Phu2]

The size of these result files depends on the size of the input, right?
I think we need to set a limit on the input files. too.