Added various methods that allow to make methods to delay to return a
value, both by using timing functions and using a way to manually
stop and restart the calls.
This is mostly done using async callbacks in dbus methods
We need to be able to hack this to be an async daemon to perform some
multi-thread tests, so replacing default implementation with a simple
one that for now just does same of default
Add scripting capabilities to the verification process so that the mock
daemon can send its own results without needing the client to prod it to
do that. This is incredibly useful when the client is single threaded
and blocking.
Note that there are barely any safeguards, so the scripting task is not
cancelled if an error occurs, or the VerifyStatus signals are sent out
of order.
