Added timestamp to AdminSelectBox for csv files

Addead according to Idea Scale #1038

https://otrsteam.ideascale.com/a/dtd/Time-stamp-for-SQL-box-admin-select.csv-output-file/388658-10369
Squashed commit of the following:

commit 2f8671404ad408e869c6d03cccd4ad2555770282
Author: Theo van Hoesel <Th.J.v.Hoesel+GitHub@gmail.com>
Date:   Wed Jun 12 07:01:02 2013 -0400

    Added timestamp to AdminSelectBox for csv files

    Addead according to Idea Scale #1038

    https://otrsteam.ideascale.com/a/dtd/Time-stamp-for-SQL-box-admin-select.csv-output-file/388658-10369
Merge branch 'timestamp-sqlbox' of https://github.com/TJvHoesel/otrs