AttributeSource

DecisionCache.Factory#getInstance(...) because AttributeValue factories
may be required for the decision cache system to be able to
create/restore AttributeValues from deserialized data stored or produced
by external - possibly remote - systems (e.g. cache storage database).
Remember that such attribute values can be present in decision results,
typically in AttributeAssignments of Obligations/Advice.

(Closeable|Base)NamedAttributeProvider to reuse the official term "named
attribute" from §7.3 of XACML 3.0 spec

DecisionCache.Factory#getInstance(...)

- AttributeProvider: get(..., BagDatatype datatype, ...) -> get(...,
Datatype datatype, ...)
- EvaluationContext: getNamedAttributeValue(AttributeFqn, BagDatatype)
-> getNamedAttributeValue(AttributeFqn, Datatype)

- Fixed javadoc of AttributeProvider interface
- BaseDesignatedAttributeProvider: removed unused exceptions
- Expressions: fixed debug logs

date/time types from AttributeValue to XmlUtils
- AttributeValueFactoryRegistry interface: added newAttributeValue() and
newAttributeBag() methods for creating AttributeValue/Bag from raw Java
types without specifying XACML datatype explicitly
- SimpleValue.BaseFactory abstract class: added getSupportedInputTypes()
for simple attribute value factories to specify the input Java types
they can parse to AttributeValue, in order to implement new
AttributeValueFactoryRegistry#newAttributeValue/Bag() methods
- X500NameValue: added constructor from X500Principal

owasp dependency check 
- update license

Map,...) FINAL
- Added utility method to Bags class to help create AttributeBag from
raw Java values (to support issue
https://github.com/authzforce/core/issues/10)