Create a PlayerTestData class

• Add a PlayerTestData class in the EntityManager.Data folder.
• The PlayerTestData should have a List property.
• In the PlayerMode class create methods to add and remove: Equipment, Gear, Mechs, Weapon from their respective list. 
• When the class instantiated it should add at least 5 different players to the PlayerModel list.
• Each Player should be added with at least a Email Address and Password.

In the EntityManagerAbstract:

• Add a method to get a player by email address
• Modify AddPlayer and RemovePlayer to use the PlayerTestData
• Modify AddPlayer and RemovePlayer to return a bool values
• (Stub-out) the following:
  • AddEquipment (accepts an EquipmentModel, returns a bool)
  • RemoveEquipment (accepts an EquipmentModel, returns a bool)
  • AddGear (accepts an GearModel, returns a bool)
  • RemoveGear (accepts an GearModel, returns a bool)
  • AddMech (accepts an MechModel, returns a bool)
  • RemoveMech (accepts an MechModel, returns a bool)
  • AddWeapon (accepts an WeaponModel, returns a bool)
  • RemoveWeapon (accepts an WeaponModel, returns a bool)
• Make sure the (Stub-out) methods throw a NotImplementedException();
• Add comments to the (Stub-out) methods that they are used to add and remove from that database.