Resolve "(CTTC) Implement ETSI MEC Bandwidth Management API in NBI component"

Closes #44 (closed)

Added initial support for the ETSI MEC Bandwidth Management API.

src/compute/service/rest_server/nbi_plugins/etsi_bwm/Resources.py

+# Copyright 2022-2023 ETSI TeraFlowSDN - TFS OSG (https://tfs.etsi.org/)
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import copy
+from common.Constants import DEFAULT_CONTEXT_NAME
+from flask_restful import Resource, request
+from context.client.ContextClient import ContextClient
+from service.client.ServiceClient import ServiceClient
+from .Tools import (
+    format_grpc_to_json, grpc_context_id, grpc_service_id, bwInfo_2_service, service_2_bwInfo)
+
+
+
+class _Resource(Resource):
+    def __init__(self) -> None:
+        super().__init__()
+        self.client = ContextClient()
+        self.service_client = ServiceClient()
+
+
+class BwInfo(_Resource):
+    def get(self):
+        service_list = self.client.ListServices(grpc_context_id(DEFAULT_CONTEXT_NAME))
+        bw_allocations = [service_2_bwInfo(service) for service in service_list.services]
+        return bw_allocations
+
+    def post(self):
+        bwinfo = request.get_json()
+        service = bwInfo_2_service(self.client, bwinfo)
+        stripped_service = copy.deepcopy(service)
+
+        stripped_service.ClearField('service_endpoint_ids')
+        stripped_service.ClearField('service_constraints')
+        stripped_service.ClearField('service_config')
+
+        response = format_grpc_to_json(self.service_client.CreateService(stripped_service))
+        response = format_grpc_to_json(self.service_client.UpdateService(service))
+
+        return response
+
+
+class BwInfoId(_Resource):
+
+    def get(self, allocationId: str):
+        service = self.client.GetService(grpc_service_id(DEFAULT_CONTEXT_NAME, allocationId))
+        return service_2_bwInfo(service)
+
+    def put(self, allocationId: str):
+        json_data = request.get_json()
+        service = bwInfo_2_service(self.client, json_data)
+        response = self.service_client.UpdateService(service)
+        return format_grpc_to_json(response)
+
+    def patch(self, allocationId: str):
+        json_data = request.get_json()
+        if not 'appInsId' in json_data:
+            json_data['appInsId'] = allocationId
+        service = bwInfo_2_service(self.client, json_data)
+        response = self.service_client.UpdateService(service)
+        return format_grpc_to_json(response)
+
+    def delete(self, allocationId: str):
+        self.service_client.DeleteService(grpc_service_id(DEFAULT_CONTEXT_NAME, allocationId))
+        return