HDDS-7056. EC: Ensure replica index is maintained when replicating a container (#3627)

diff --git a/hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/keyvalue/KeyValueContainerData.java b/hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/keyvalue/KeyValueContainerData.java
index df37de5..19a13a6 100644
--- a/hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/keyvalue/KeyValueContainerData.java
+++ b/hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/keyvalue/KeyValueContainerData.java
@@ -122,6 +122,7 @@
     this.numPendingDeletionBlocks = new AtomicLong(0);
     this.deleteTransactionId = 0;
     this.schemaVersion = source.getSchemaVersion();
+    this.replicaIndex = source.getReplicaIndex();
   }
 
   /**
diff --git a/hadoop-hdds/container-service/src/test/java/org/apache/hadoop/ozone/container/common/TestKeyValueContainerData.java b/hadoop-hdds/container-service/src/test/java/org/apache/hadoop/ozone/container/common/TestKeyValueContainerData.java
index 86701bb..2edf8b0 100644
--- a/hadoop-hdds/container-service/src/test/java/org/apache/hadoop/ozone/container/common/TestKeyValueContainerData.java
+++ b/hadoop-hdds/container-service/src/test/java/org/apache/hadoop/ozone/container/common/TestKeyValueContainerData.java
@@ -97,6 +97,7 @@
     kvData.setContainerDBType(containerDBType);
     kvData.setChunksPath(path);
     kvData.setMetadataPath(path);
+    kvData.setReplicaIndex(4);
     kvData.incrReadBytes(10);
     kvData.incrWriteBytes(10);
     kvData.incrReadCount();
@@ -121,6 +122,12 @@
     assertEquals(datanodeId.toString(), kvData.getOriginNodeId());
     assertEquals(VersionedDatanodeFeatures.SchemaV3.chooseSchemaVersion(conf),
         kvData.getSchemaVersion());
+
+    KeyValueContainerData newKvData = new KeyValueContainerData(kvData);
+    assertEquals(kvData.getReplicaIndex(), newKvData.getReplicaIndex());
+    assertEquals(0, newKvData.getNumPendingDeletionBlocks());
+    assertEquals(0, newKvData.getDeleteTransactionId());
+    assertEquals(kvData.getSchemaVersion(), newKvData.getSchemaVersion());
   }
 
 }