System accounts disambiguation: Create hapi tests for transfer and send operations for system accounts

[kselveliev]

Problem

Calling operations on system accounts in hedera may differ from ethereum.
We need to add hapi tests for them and check and document the behaviour.

Solution

Add tests for transfer and send operations involving the system accounts and ensure that these tests conform to the following expected behavior.

Alternatives

No response

[0xivanov]

Opening because there is part 2 PR : #11490