Re #8571 - CertificateService tests
Re #8571 - certificate_service.py revocation support end tests
Re #8573 - Added some CertificateService tests and improved CryptographyService tests of methods that extract public keys
Re #8573 - Improved testing of extract_public_key_from_certificate and extract_public_key_from_private_key methods
Re #8573 - Implemented extract_public_key_from_certificate
Re #8573 - Changed extract_public_key method in such way that it now extracts a public key from a private key instead of a certificate
Re #8573 - Implemented extract_public_key method that allows the caller to extract a public key from a certificate
Re #8472 - Added a parameter to the craete_sscrt method in CryptographyService in order to be able to specify tha number of days for which the generated certificate will be valid.
Re #8472 - Improved SQL connection/cursor fixtures in such way that connection to DB happens only once per test module