Add OperationPolicyName filtering support for Locate

This change updates Locate operation support in the PyKMIP server,
allowing users to filter objects based on the object's Operation
Policy Name. Unit tests and integration tests have been added to
test and verify the correctness of this feature.

Additionally, the Locate demo scripts have also been updated to
support Operation Policy Name filtering. Simply use the
"--operation-policy-name" flag to specify an Operation Policy Name
string value for the Locate script to filter on.

kmip/demos/utils.py

@@ -296,6 +296,14 @@ def build_cli_parser(operation=None):
             dest="unique_identifier",
             help="The unique identifier of the secret (e.g., 1, 2, 3)"
         )
+        parser.add_option(
+            "--operation-policy-name",
+            action="store",
+            type="str",
+            default=None,
+            dest="operation_policy_name",
+            help="The operation policy name of the secret (e.g., default)"
+        )
     elif operation is Operation.REGISTER:
         parser.add_option(
             "-f",