This change adds SymmetricKey to the Pie object hierarchy along with a
test suite and updates to the other classes and test suites composing
the Pie interface.
This change adds two additional abstract base classes for the Pie
ManagedObject object hierarchy: CryptographicObject and Key. Test suites
are provided for each base class, using a dummy subclass of each for
testing. The object test suite package structure is also modified to
collect all ManagedObject subclass tests in one package.
This change adds ManagedObject, the abstract base class of the
simplified KMIP object hierarchy. It defines a set of attributes common
to all KMIP objects and registers placeholder methods to be implemented
by all subclasses. A basic test suite is included, using a dummy
ManagedObject subclass for testing.
