Fixing issues with the WebUI and the optical cybersecurity module

This MR focuses on fixing the issues reported in two issues:

• Closes #57 (closed)
• Closes #102 (closed)

The changes are as follows:

• Version of the Flask package has been updated to fix the issues in the WebUI.
• The tests of the opticalattackdetector have been reworked to fix the issue.

The pipelines are here:

• Optical attack detector: https://labs.etsi.org/rep/tfs/controller/-/jobs/51936
• WebUI: https://labs.etsi.org/rep/tfs/controller/-/pipelines/4220

src/opticalattackdetector/tests/test_unitary.py

@@ -21,7 +21,6 @@ import pytest
 
 from common.proto import dbscanserving_pb2 as dbscan
 from common.proto.optical_attack_detector_pb2 import DetectionRequest
-from common.tests.MockServicerImpl_Monitoring import MockServicerImpl_Monitoring
 
 from opticalattackdetector.client.OpticalAttackDetectorClient import \
     OpticalAttackDetectorClient
@@ -58,8 +57,6 @@ def test_detect_attack(
     message = dbscan.DetectionResponse()
     message.cluster_indices.extend([0, 1, -1, -1, -1])
 
-    # monitoring_mock = MockServicerImpl_Monitoring(queue_samples = queue.Queue())
-    # TODO: remove the monitoring mock
     with patch(
         "opticalattackdetector.service.OpticalAttackDetectorServiceServicerImpl.attack_mitigator_client"
     ) as mitigator, patch(