Add operation policy name to demo scripts

This change adds the ability to set the operation policy name
attribute to object creation demo scripts, including demos for
the Create, CreateKeyPair, and Register operations.

kmip/demos/units/create.py

@@ -13,6 +13,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from kmip.core import enums
 from kmip.core.enums import AttributeType
 from kmip.core.enums import CredentialType
 from kmip.core.enums import CryptographicAlgorithm
@@ -108,6 +109,14 @@ if __name__ == '__main__':
     name = Attribute(attribute_name=name, attribute_value=value)
 
     attributes = [algorithm_obj, usage_mask, length_obj, name]
+
+    if opts.operation_policy_name is not None:
+        opn = attribute_factory.create_attribute(
+            enums.AttributeType.OPERATION_POLICY_NAME,
+            opts.operation_policy_name
+        )
+        attributes.append(opn)
+
     template_attribute = TemplateAttribute(attributes=attributes)
 
     # Create the SYMMETRIC_KEY object