CBQE-547 fix the bug in verification. Update the hash method

Change-Id: I08c569b1e29912b562a0f29503353aea7d6099ea
Reviewed-on: http://review.couchbase.org/20844
Reviewed-by: Chisheng Hong <chisheng@couchbase.com>
Tested-by: Chisheng Hong <chisheng@couchbase.com>

pytests/backup/backup_base.py

@@ -105,7 +105,7 @@ def verify_single_node(self, server, kv_store=1):
             memcacheds, vBucketMap, vBucketMapReplica = VBucketAware.request_map(rest, bucket.name)
             valid_keys, deleted_keys = bucket.kvs[kv_store].key_set()
             for key in valid_keys:
-                vBucketId = crc32.crc32_hash(key) & (len(vBucketMap) - 1)
+                vBucketId = VBucketAware._get_vBucket_id(key)
                 which_server = vBucketMap[vBucketId]
                 sub = which_server.find(":")
                 which_server_ip = which_server[:sub]