Design and create the order and procurement related entities

[t-andrews]

The Accounting feature will require the following entities. They should be added as tables in the database:

• Vendor: item seller
• Customer: item buyer
• Order: linked to a positive payment and a customer.
• Procurement: linked to a negative payment and a
• Payment: actual payment amount received/payed

Customer:	Attribute	Type
customer_id	long
name	string
address	string
phone_number	string

Vendor:	Attribute	Type
vendor_id	long
name	string
address	string
phone_number	string

Order:	Attribute	Type
order_id	long
item_id	long
customer_id	long
payment_id	string
item_quantity	integer
state	string

Procurement:	Attribute	Type
procurement_id	long
item_id	long
vendor_id	long
payment_id	long
item_quantity	integer
state	string

Payment:	Attribute	Type
payment_id	long
amount	price
state	string