As an admin, I need to see the correct string representation of data file fiscal period in LogEntry model

[ADPennington]

This portion of code has incorrect mapping of fiscal quarters to months.

example of incorrect string for data submitted for fiscal Q2

The correct mapping (frontend reflects this mapping):

• fiscal qtr 1: Oct - Dec
• fiscal qtr 2: Jan - Mar
• fiscal qtr 3: Apr - Jun
• fiscal qtr 4: Jul - Sep

ACs:

• log entries related to data submission emails show the correct string representation of the data file's fiscal period
• all users who submit data receive email the correct string representation in email
• Testing Checklist has been run and all tests pass
• README is updated, if necessary

Tasks:

• update data_files models.py
• Run Testing Checklist and confirm all tests pass