datetime bug in (product) import/export

[bh-ref]

Steps to reproduce

1. In backend, go to Stores / Settings / Configuration / General / General / Locale Options.
2. Set Locale to German (Switzerland).
3. Export a product which has value in a datetime field (Special price from/to date, New from/to date).

Expected result

1. With the Locale English (United States ), a an exportet datetime looks like 2015-03-16 16:08:55

Actual result

1. With the Locale German (Switzerland), a an exportet datetime looks like 16.03.15, 17:08
2. Which is a problem, because when I delete the product and use the export to import/create it again, it fails with the following error message:
   Value for '%s' attribute contains incorrect value

[piotrekkaminski]

internal issue MAGETWO-54246

[veloraven]

I'm closing this issue as we were not able to reproduce it on develop branch, most likely it was fixed in scope of some other task.
If you can still reproduce this issue, please create a new GitHub issue report.