Pawn Blueprint cannot have variables default value set in Engine ini

When using a pawn blueprint, you cannot modify the value of a variable in the config files. This issue does not affect other kinds of blueprints, as this issue does not affect actor blueprints.

Regression:
This issue occurs in the 4.14.3, 4.15.3, and 4.16 binary builds of the engine

1. Create a new project (No template or starter content needed)
2. Add a Pawn Blueprint > Name it "TestPawn" > Open TestPawn
3. Add a variable > Name it "Test" > make it type of float
4. In the variables advanced options check the box for Config Variable
5. Save and close the project
6. In the Project's folder Open the config folder and open the File DefaultEngine.ini
7. In the test file, copy the format of Screenshot_01
8. Open the project again and Open "TestPawn"
9. Click the Variable "Test"

Result: The default value of the variable is 0
Expected Result: The default value of the variable should be 123456789