Api e2e tests with blockchain - use case 3

[pawelkisielewicz]

It should be tested e2e that concent works properly with blockchain- founds are transferred correctly.

One of possible scenarios is situation, where there is one requestor and two providers. There is Use Case 3- after message timeout both providers send ForceSubtaskResults to concent. In the next step they (providers) send ClientAuthorization and concent finalizes payments.
There are two scenarios to check:

• requestor has enough founds to pay both providers. In this case both providers should get full amount and requestor's account should be decreased by this amount.
• requestor has founds to pay only one provider. One provider should get full amount, second provider should be paid, but not fully, requestor's account should be 0.

Message exchange (after message timeout):
Provider 1 -> Concent: ForceSubtaskResults
Provider 2 -> Concent: ForceSubtaskResults
no communication from requestor
Provider 1 -> Concent: ClientAuthorization
Provider 2 -> Concent: ClientAuthorization

It should be created test with communication as above and check on blockchain, if founds are really transferred. In the next step we should ensure that at the end all deposit claims in concent are removed from database. This will be described in separate issue

[PaweuB]

Pivotal:
https://www.pivotaltracker.com/story/show/162196236

[dybi]

for mi this is quite OK. However, this should be done after: #744 (UC#5).