Small technology code cleanup

[Kieran P]

Extract the if (cmpTechMan) conditional and code into a global helper function.

Also, make the whole tech engine take arguments in this order: entity/player, tech type, current value

function ApplyTechModificationsToEntity(entity, tech_type, current_value) {
  var cmpTechMan = QueryOwnerInterface(entity, IID_TechnologyManager);

  if (!cmpTechMan)
    return current_value;

  return cmpTechMan.ApplyModifications(entity, tech_type, current_value); 
}

function ApplyTechModificationsToPlayer(player_entity, tech_type, current_value) {
  var cmpTechMan = Engine.QueryInterface(player_entity, IID_TechnologyManager);

  if (!cmpTechMan)
    return current_value;

  return cmpTechMan.ApplyModifications(player_entity, tech_type, current_value); 
}

ApplyTechModificationsToEntity(this.entity, "Health/Max", +this.template.Max);
ApplyTechModificationsToPlayer(this.entity, "Player/MaxPopulation", +this.template.MaxPopulation);

[Jonathan Waller]

In 13056:

Make technology code cleaner with helper functions. Refs #1692.

[leper]

In 13059:

Add template helper function. Fix some errors. Refs #1692.

[leper]

The player/entity ordering has a problem with templates (needed in ProductionQueue).