Enable aborting ops from outdated distributors by default
Enable aborting ops from outdated distributors by default

This lets a content node inspect all incoming mutating external
operations and reject them if their source distributor is not the
current ideal distributor for the operation's bucket. Will only trigger
during bucket handover edges (cluster state transitions).

This config switch should have been done ages ago, but was lost to the
sands of time. Better late than never.

vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa