DLT component (and related) improvements

Common:

• Extended common/object_factory
• Added DLT_GATEWAY ServiceName for test and debug purposes
• Implemented MockMessageBroker for test and debug purposes
• Extended MockServicerImpl_Context with MockMessageBroker and refactored code
• Implemented MockServicerImpl_DltGateway
• Extended deploy.sh script to support DLT components
• Removed unneeded genproto.sh script

Context:

• Improved Context/EventsCollector generic client

DLT:

• Separated DLT component into Connector and Gateway
• Implemented MockBockchain component exposing DLT Gateway API to facilitate debugging
• Implemented/Extended/Corrected Dockerfiles, manifests, etc. for DLT components
• Implemented preliminary version of CI/CD pipeline definition for DLT (still not integrated in pipeline)

DLT Connector:

• Implemented DltConnectorClient
• Implemented DltEventsCollector
• Implemented DltGatewayClient
• Initial (incomplete) implementation of DltConnector
• Initial (incomplete) unitary test for DltConnector

DLT Gateway:

• Extended logic of DltGateway

manifests/dltservice.yaml

+# Copyright 2021-2023 H2020 TeraFlow (https://www.teraflow-h2020.eu/)
+#
+# 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.
+
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dltservice
+spec:
+  selector:
+    matchLabels:
+      app: dltservice
+  template:
+    metadata:
+      labels:
+        app: dltservice
+    spec:
+      terminationGracePeriodSeconds: 5
+      containers:
+      - name: connector
+        image: registry.gitlab.com/teraflow-h2020/controller/dlt-connector:latest
+        imagePullPolicy: Always
+        ports:
+        - containerPort: 8080
+        env:
+        - name: LOG_LEVEL
+          value: "INFO"
+        readinessProbe:
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:8080"]
+        livenessProbe:
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:8080"]
+        resources:
+          requests:
+            cpu: 250m
+            memory: 512Mi
+          limits:
+            cpu: 700m
+            memory: 1024Mi
+      - name: gateway
+        image: registry.gitlab.com/teraflow-h2020/controller/dlt-gateway:latest
+        imagePullPolicy: Always
+        #readinessProbe:
+        #  httpGet:
+        #    path: /health
+        #    port: 8081
+        #  initialDelaySeconds: 5
+        #  timeoutSeconds: 5
+        #livenessProbe:
+        #  httpGet:
+        #    path: /health
+        #    port: 8081
+        #  initialDelaySeconds: 5
+        #  timeoutSeconds: 5
+        resources:
+          requests:
+            cpu: 250m
+            memory: 512Mi
+          limits:
+            cpu: 700m
+            memory: 1024Mi
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: dltservice
+spec:
+  type: ClusterIP
+  selector:
+    app: dltservice
+  ports:
+  - name: grpc
+    protocol: TCP
+    port: 8080
+    targetPort: 8080