Chsnge to OpenApi 3.0

In preparation for the Java 17 and Springboot 3 migrations Swagger Codegen has to upgrade to OpenApi 3.0
This effects cps-rest and cps-ncmp-rest

Issue-Id: CPS-1745

Signed-off-by: egernug <gerard.nugent@est.tech>
Change-Id: I18b8e9ca26d0123009702c2474efbfbeec6d4c44
diff --git a/cps-rest/docs/openapi/openapi.yml b/cps-rest/docs/openapi/openapi.yml
index d5ba97a..4bbf9f0 100644
--- a/cps-rest/docs/openapi/openapi.yml
+++ b/cps-rest/docs/openapi/openapi.yml
@@ -1,5 +1,5 @@
 #  ============LICENSE_START=======================================================
-#  Copyright (C) 2021 Nordix Foundation
+#  Copyright (C) 2021-2023 Nordix Foundation
 #  Modifications Copyright (C) 2021 Pantheon.tech
 #  Modifications Copyright (C) 2021 Bell Canada.
 #  Modifications Copyright (C) 2022-2023 TechMahindra Ltd.
@@ -19,7 +19,7 @@
 #  SPDX-License-Identifier: Apache-2.0
 #  ============LICENSE_END=========================================================
 
-openapi: 3.0.1
+openapi: 3.0.3
 info:
   title: ONAP Open API v3 Configuration Persistence Service
   description: Configuration Persistence Service is a Model Driven Generic Database