[Purchase Orders] - Setup guardian contract to interact with the purchase order functionality

[dorucioclea]

User story:

I need to be able to submit the details of my purchase order

• Setup guardian contract to interact with the purchase order functionality

  • Should have an emergency flag to disable setting up a purchase order
  • Should be able to disable purchase orders being setup by participants who have defaulted a number of times.
  • Should be able to disable purchase orders being setup by participants who are currently involved in multiple purchases depending on the nature of collateral provided and repayment reputation based on previous loans.