ZoneControl:Thermostat should move the extensible fields at the end

Issue overview

Here is the current IDD:

ZoneControl:Thermostat,
  A1 , \field Name
  A2 , \field Zone or ZoneList Name
  A3 , \field Control Type Schedule Name
  A4 , \field Control 1 Object Type
  A5 , \field Control 1 Name
  A6 , \field Control 2 Object Type
  A7 , \field Control 2 Name
  A8 , \field Control 3 Object Type
  A9 , \field Control 3 Name
  A10, \field Control 4 Object Type
  A11, \field Control 4 Name
  N1 ; \field Temperature Difference Between Cutout And Setpoint

Field N1 should be moved betwen A3 and A4, so we can treat the Control Object Type / Control Object Name as extensible fields (in openstudio in particular, see https://github.com/NREL/OpenStudio/issues/3584#issuecomment-527249170)

Details

Some additional details for this issue (if relevant):

• Platform (Operating system, version)
• Version of EnergyPlus (if using an intermediate build, include SHA)
• Unmethours link or helpdesk ticket number

Checklist

Add to this list or remove from it as applicable. This is a simple templated set of guidelines.

• Defect file added (list location of defect file here)
• Ticket added to Pivotal for defect (development team task)
• Pull request created (the pull request will have additional tasks related to reviewing changes that fix this defect)

Locate the current IDD definition for ZoneControl:Thermostat and inspect the field ordering. Move the Temperature Difference Between Cutout And Setpoint field between A3 and A4, then verify that the resulting IDD still parses and preserves the extensible control object fields.