This change adds a new Enum subclass, OrderedEnum, that provides
comparison operators allowing for comparisons between enum values.
This will be used going forward with the KMIPVersion enum enabling
version checking on supported or unsupported object types.
This change adds a new Attributes object to the object hierarchy,
which replaces TemplateAttributes in KMIP 2.0. The old attribute
components, like the AttributeName and AttributeIndex, are no
longer used and are instead replaced with the KMIP TTLV tag for
the attributes in question. This brings the attribute encoding
process in line with the rest of the KMIP specification.
To support this change, additional attribute and enumeration
utility functions have been added to simply attribute building
and attribute/enumeration validity checking. New test cases
covering this new functionality are also included.
