Forms should inform that the timezone at the export process is GMT

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X, 7.1.X, Master
• Fix Version/s: 7.0.0 DXP FP85, 7.0.10.12 DXP SP12, 7.0.X, 7.1.10 DXP FP13, 7.1.10.3 SP3, 7.1.X, 7.2.10 DXP FP1, 7.2.1 CE GA2, 7.2.X, 7.3.10 DXP GA1, Master
• Component/s: Forms
• Labels:
  • ee-ts
  • liferay-dxp-70-sp12
  • liferay-dxp-71-sp3
  • liferay-fixpack-de-85-7010
  • liferay-fixpack-dxp-1-7210
  • liferay-fixpack-dxp-13-7110
• Branch Version/s:
  7.2.x, 7.1.x, 7.0.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/74242

The csv file created in the forms export procces register the time with GMT timezone. 

It doesn't take into account the portal or user timezone configuration, so it should inform the actual timezone with an advise.

Reproduction steps:
1, Set Portal Instance's timezone different to GMT
2, Set User's timezone different to GMT 
3, Create a form entry (by creating a form, then submitting 1 entry) 
4, Export the entries to CSV 
5, Open with editor or Excel

 Actual result: the timezone is actually in GMT

 Expected result: The portal should inform that the timezone used at the exportation process will be GMT regardless of which timezone is configured on the instance.