Each stage waits until transaction persists. This is needed to ensure
the next stage will see the result of the previous one. However, some of
the stages do not depend one on another, so we may execute them in
parallel.
`AwaitDisabled` flag is used to localize this batching on the code
level. We could've removed `AwaitTx()` from respective stages, but it
seems more error prone.
Close#652.
Change-Id: Ib9c6f6cd5e0db0f31aa1cda8e127b1fad5166336
Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
