Fix for Axon-263: Saga managers don't accept multiple base packages for scanning. The base-package value is now split on comma before processing.
Fixed custom ParameterResolverFactory support in annotated aggregates

The ParameterResolverFactory can now be attached to the Unit of Work. When an
aggregate is created outside the scope of an AggregateFactory, the aggregate
tries to pick up the PRF from the UoW. If not present, it will resort to the
default implementation.

Issue #AXON-265 Fixed
Merge branch 'axon-2.3.x' of git://github.com/renedewaele/AxonFramework into renedewaele-axon-2.3.x
Adapted unit tests for multi-package support in saga manager

Issue #AXON-263 Fixed