Two different scheduler implementations.

Two different scheduler implementation, same module name, with similar functions, but very diverged source code. They were intended to be one implementation, based on the task.c source code impression (task enums for enforcer and signer in single source base).
Source code signer/src/scheduler/schedule.[ch] and enforcer/src/scheduler/schedule.[ch] contain implementations for the same symbols: schedule_create(), schedule_flush(), schedule_task(), schedule_pop_task(), schedule_cleanup().