[MAGETWO-45528] Scheduled Imports/Exports report has wrong date columns

[piotrekkaminski]

Preconditions

1. Default config locale America/Chicago
2. PHP Server locale Europe/Kiev

Steps to reproduce

1. Go to System->Scheduled Import/Export
2. Click Add Scheduled Export
3. Fill required data
   File Directory: var/myexport
4. Save it
5. In Scheduled grid Imports/Export in action column click run
6. Open folder var/myexport

Expected result

1. filename contains date of default config locale(Chicago)
2. columns created_at, updated_at have UTC time with proper timezone designation

Actual result

1. filename contains date UTC
2. columns created_at, updated_at have Kiev times