Allow Hub operator staff to set up thresholds for notification of Participant staff

[PaulMakinMojaloop]

[PaulMakinMojaloop]

As a member of Hub operator staff, I want to facilitate notifications for Participant staff who have provided contact details that are registered with the Participant's details at the Hub.

##Prerequisites:

1. From the list of registered contacts, one must be selected to receive notifications
2. All contact details for that individual must be completed.

##Actions For each currency the Participant is operating in, the hub operator staff member must:

• Set a minimum value of available liquidity
• Set a percentage of NDC

for which notifications will be generated.