Add an actor for entity rpc execution.
Instead of entity-owners rpcs being handled by owner supervisor
directly add an actor that handles the execution, preventing failures
that happen after the akka singleton has moved to a different node.
This new actor first attempts to retrieve current data from the supervisor
and if that fails, falls back to using distributed-data.
JIRA: CONTROLLER-2010
Change-Id: Idf71d66d380402c10e276c726edef2f5034f7363
Signed-off-by: Tomas Cere <tomas.cere@pantheon.tech>
Signed-off-by: Robert Varga <robert.varga@pantheon.tech>