support tls connection possibility in all cleanup.py functions

[mwr-ebc]

Describe the bug
Using any inplemented function from the cleanup.py there is no possibility to establish a connection to a tls secued client.

To Reproduce
CB_URL = "https://........."
fiware_header = FiwareHeader(service=SERVICE,
service_path=SERVICE_PATH)
clear_context_broker(url=CB_URL, fiware_header=fiware_header)

Expected behavior
Should connect to client and selete all entities under service.

Screenshots
requests.exceptions.SSLError: HTTPSConnectionPool(host='', port=443): Max retries exceeded with url: /version (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1129)')))

Environment (please complete the following information):

Additional context

[github-actions]

Branch 248-support-tls-connection-possibility-in-all-cleanup-py-functions created!