Updated OrderFrequencyValidator to implement spring Validator and added tests to ensure that frequency and order type validators get invoked when their supported types get saved
Follow up to fix failing unit tests
Add isType() method to Order class - TRUNK-4290

Follow up - TRUNK-4290
Renamed OrderService.getOrderSubtypes to getSubtypes
Made follow up to add utility method for testing order type hierarchies - TRUNK-4290
Updated OrderService.saveOrder to auto set the careSetting and orderType fields if they are null but present on the passed OrderContext
Updated OrderService.getActiveOrders to return orders with a future startDate
Renamed OrderUtil.isOrderActive to isActiveOrder and moved it to OrderUtilTest
TRUNK-4265 Add strength field to Drug