[async] Update Async spec to require mediator objects to be thread safe. Change examples to store the mediator in a field
[async] Update Async spec to require mediator objects to be thread safe. Change examples to store the mediator in a field

osgi/osgi,osgi/osgi,osgi/osgi,osgi/osgi,osgi/osgi,osgi/osgi,osgi/osgi,osgi/osgi