Refactor run_blocking_function

[prjemian]

Refactor the apstools.plans.run_blocking_function() plan to create a subclass or ophyd.Signal with an added trigger() method. In an inner function of that method, it runs the blocking function and then sets the status object to done. The plan calls the inner method with yield from bps.trigger(subclass_object).

[prjemian]

apstools/apstools/plans/run_blocking_function_plan.py

Line 11 in a165d24

def run_blocking_function(function, *args, **kwargs):