fixing de/serialziation issue

Author: philipthomas-MSFT

Microsoft.Azure.Cosmos/src/Resource/FullFidelity/ChangeFeedMetadata.cs

@@ -19,50 +19,31 @@ namespace Microsoft.Azure.Cosmos
 #endif 
         class ChangeFeedMetadata
     {
-        /// <summary>
-        /// New instance of meta data for <see cref="ChangeFeedItem{T}"/> created.
-        /// </summary>
-        /// <param name="conflictResolutionTimestamp"></param>
-        /// <param name="lsn"></param>
-        /// <param name="operationType"></param>
-        /// <param name="previousLsn"></param>
-        public ChangeFeedMetadata(
-            DateTime conflictResolutionTimestamp,
-            long lsn,
-            ChangeFeedOperationType operationType,
-            long previousLsn)
-        {
-            this.ConflictResolutionTimestamp = conflictResolutionTimestamp;
-            this.Lsn = lsn;
-            this.OperationType = operationType;
-            this.PreviousLsn = previousLsn;
-        }
-
         /// <summary>
         /// The conflict resolution timestamp.
         /// </summary>
         [JsonProperty(PropertyName = "crts", NullValueHandling = NullValueHandling.Ignore)]
         [JsonConverter(typeof(UnixDateTimeConverter))]
-        public DateTime ConflictResolutionTimestamp { get; }
+        public DateTime ConflictResolutionTimestamp { get; internal set; }
 
         /// <summary>
         /// The current logical sequence number.
         /// </summary>
         [JsonProperty(PropertyName = "lsn", NullValueHandling = NullValueHandling.Ignore)]
-        public long Lsn { get; }
+        public long Lsn { get; internal set; }
 
         /// <summary>
         /// The change feed operation type.
         /// </summary>
         [JsonProperty(PropertyName = "operationType")]
         [JsonConverter(typeof(StringEnumConverter))]
-        public ChangeFeedOperationType OperationType { get; }
+        public ChangeFeedOperationType OperationType { get; internal set; }
 
         /// <summary>
         /// The previous logical sequence number.
         /// </summary>
         [JsonProperty(PropertyName = "previousImageLSN", NullValueHandling = NullValueHandling.Ignore)]
-        public long PreviousLsn { get; }
+        public long PreviousLsn { get; internal set; }
 
         /// <summary>
         /// Used to distinquish explicit deletes (e.g. via DeleteItem) from deletes caused by TTL expiration (a collection may define time-to-live policy for documents).