Thomas Schroeter ad2890193d
Specify Notary in CashIssueAndPaymentFlow and PaymentRequest (#3443)
* Specify notary in CashIssueAndPaymentFlow

* Specify notary in PaymentRequest

* Address comments

* Default to the first notary in the `CashPaymentFlow`
2018-06-26 16:45:18 +01:00
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