Enhance OrderService API to fetch orders by status across patients

Currently there is a OrderService.getActiveOrders(Patient patient, OrderType orderType, CareSetting careSetting, Date asOfDate) method.

What is desirable:

• A similar method that queries across all patients. This functionality could be implemented in the method OrderService.getOrders(OrderSearchCriteria orderSearchCriteria).
• In addition to "active" orders, allow querying by other status: future-scheduled, expired, fulfilled (query by Order.FulfillerStatus where appropriate).
• FulfillerStatus: add a new status "PRELIMINARY". This can be used for lab orders that are resulted but need verification.
• CAUTION: "Active" status logic should be consistent across OrderService.getActiveOrders(), OrderService.getOrders() and Order.isActive()