-adding returnUnsignedIntegerValue to MockActualCall.
adding support to returnUnsignedIntOrDefault to MockActualCall.
adding returnUnsignedIntValueOrDefault to MockSupport.
Just a small refactoring removing duplicated logic :-)
Merge pull request #326 from katcipis/addReturnUnsignedIntValueOrDefault

Add returnUnsignedIntValueOrDefault