Open Scheduler and SchedulerBuilder to provide custom implementations of everything. #772
Description
Right now, there is no way to create custom implementation of the TaskRepository and set it up for ScheduleBuilder for example. It is needed to extend classes and maintain them.
For regular usage, it would be nice to have an opportunity to provide my implementations of the Repository and other interfaces to make it workable with our custom storage, which is not JDBC compatible at all. Like in the project with Mongo.