ARIES-713 Deliver a new ScheduledExecutorService class, and support, that allows us to switch between ScheduledExecutorServices in the service registry and default ones to allow better integration into server threading environments. Note it is a very bad idea for the BlueprintExtender and teh BlueprintEventDispatcher to use the same thread pool.
aries/trunk/blueprint/blueprint-core/src/main/java/org/apache/aries/blueprint/container/BlueprintContainerImpl.java
aries/trunk/blueprint/blueprint-core/src/main/java/org/apache/aries/blueprint/utils/threading/