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In the test test_tablet_mv_replica_pairing_during_replace we stop 2 out of 4 servers while using RF=2.
Even though in the test we use exactly 4 tablets (1 for each replica of a base table and view), intially,
the tablets may not be split evenly between all nodes. Because of this, even when we chose a server that
hosts the view and a different server that hosts the base table, we sometimes stoped all replicas of the
base or the view table because the node with the base table replica may also be a view replica.
After some time, the tablets should be distributed across all nodes. When that happens, there will be
no common nodes with a base and view replica, so the test scenario will continue as planned.
In this patch, we add this waiting period after creating the base and view, and continue the test only
when all 4 tablets are on distinct nodes.
Fixes https://github.com/scylladb/scylladb/issues/23982
Fixes https://github.com/scylladb/scylladb/issues/23997
Closes scylladb/scylladb#24111
(cherry picked from commit bceb64fb5a)
Closes scylladb/scylladb#24126