Correts Bug with Default Serializers

Signed-off-by: Justin Yost <justin@loadsys.com>
Calls Method for Optional Attributes Not Present in Data

Allows for setting up a method for data that is not present, this method must however be set as an optional attribute
Testing the SerializerIgnoreException - allows for throwing an exception to skip keys, Exception is caught by the base Serializer Class

Signed-off-by: Justin Yost <justin@loadsys.com>