Do not break actor containment

Do not break actor containment

During async persistence the actor containment is broken which
results in applyState being called directly from the persistence actor.
This means that the ClientRequestTracker might be missing an entry
for the transaction and the transaction being applied as a foreign candidate
in ShardDataTree.
If this happens there will be a transaction stuck in COMMIT_PENDING state,
blocking any further progress in the shard until its restarted.

JIRA: CONTROLLER-1890
Change-Id: I944b233d13103df08b68baeaf3907c064d1d526e
Signed-off-by: Tomas Cere <tomas.cere@pantheon.tech>
Signed-off-by: Robert Varga <robert.varga@pantheon.tech>