Adding Position History & Dummy Data for Department Members

[ArtemKurasov]

Changes

• Added the position history file to the database (can be found in the app/models/positionHistory.py file).
• Added some dummy data for Department Members to the demo_data.py file.

Testing

• Test if the dummy data is in the database:
  • type mysql -u root -proot --skip-ssl to open MySQL
  • then enter USE lsf; to go to the LSF database specifically
  • run "SHOW TABLES;" to view all the entities that exist in the LSF database
  • type SELECT * FROM supervisordepartment; to select the table representing Department Members
  • if there's something similar to the screenshot below, everything works properly!
  • enter "EXIT;" to exit MySQL
  • run Flask to ensure that the dummy data does not break the website