implement missing elements in SetHoldOnMailboxes operation

[gautamsi]

• IncludeNonIndexableItems
• Deduplication

these two are listed in SetHoldOnMailboxes operation but they are missing in SetHoldOnMailboxesRequest.cs

[gautamsi]

this is added as SetHoldOnMailboxesParameters properties. Need to use as

let param:SetHoldOnMailboxesParameters = new SetHoldOnMailboxesParameters();
param.HoldId = holdID;
param.Mailboxes = <string array>;
param.ItemHoldPeriod = <"Unlimited" | TimeSpan ToString value>; // see c# TimeSpan ToString() method
param.PerformDeduplication = true;
param.IncludeNonIndexableItems = false;
param.Query = "<query string>";
param.ActionType = <HoldAction> Type; // e.g. HoldAction.Create;

service.SetHoldOnMailboxes(param).then(......);