MagicKey sometimes fails to find a segment

Tests using new MagicKey(primary, backup) may randomly fail because SyncConsistentHashFactory assigns the segments randomly and doesn't really try to cover all primary+backup combinations.

java.lang.IllegalStateException: Could not find any segment owned by Cache 'dist'@Test-NodeA, [Cache 'dist'@Test-NodeB], primary segments: {17-34 47-48 50 55-65 73 105-123 140-147 158-161}, backup segments: {Cache 'dist'@Test-NodeB={1-2 43-46 51 74-76 88-104 152-155 176-188 196-204 220-221 230-239}}

There are quite a few affected tests in CI and in my local test logs:

org.infinispan.conflict.impl.BaseMergePolicyTest.testPartitionMergePolicy
org.infinispan.distribution.DistSkipRemoteLookupBatchingTest.testSkipLookupOnGetWhileBatching
org.infinispan.partitionhandling.DelayedAvailabilityUpdateTest.testDelayedAvailabilityUpdate
org.infinispan.partitionhandling.OptimisticTxPartitionAndMergeDuringRollbackTest.testSplitBeforeRollback
org.infinispan.partitionhandling.PessimisticTxPartitionHandlingReleaseLockTest.testLockReleased
org.infinispan.partitionhandling.StreamDistPartitionHandlingTest.testUsingIteratorButPartitionOccursBeforeRetrievingRemoteValues
org.infinispan.partitionhandling.ThreeWaySplitAndMergeTest.testSplitAndMerge
org.infinispan.partitionhandling.TwoWaySplitAndMergeTest.testSplitAndMerge
org.infinispan.statetransfer.ReadAfterLostDataTest.test
org.infinispan.statetransfer.TxDuringStateTransferTest.testConditionalReplace