3.0 (Owner) Pay invoice

As Owner,
I want to mark a submitted invoice as paid.

Pre-condition

• 0.0 Login

Primary flow

Given
  a submitted invoice
  and the owner is logged in [0.0 Login]

when
  the owner submits the payment information
    for the invoice

then
  the system marks the invoice as paid,
  saves the invoice,
  notifies the vendor,
  and notifies the owner