Step 5: Modifying ContextFactory

Modify ContextFactory so that it defines a method that returns the new context API.
The following text is an example of code that can be added to ContextFactory.gs.
/**
* Returns the api implementation object casted to {@link gw.cucumber.cucumber.customer.steps.context.api.CalendarContext_Ext}.
* This method should be used on contexts that are LOB agnostic.
*/
function getCalendarContext_Ext() : CalendarContext_Ext
