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/pie/create.py

@@ -46,7 +46,11 @@ if __name__ == '__main__':
     # Build the client and connect to the server
     with client.ProxyKmipClient(config=config) as client:
         try:
-            uid = client.create(algorithm, length)
+            uid = client.create(
+                algorithm,
+                length,
+                operation_policy_name=opts.operation_policy_name
+            )
             logger.info("Successfully created symmetric key with ID: "
                         "{0}".format(uid))
         except Exception as e: