Re #8572 - Adjusted CertificateService unit tests according to the new `delete_certificate` specification.
Re #8571 - Fixed problems during walk-through code review
Re #8571 - Fixed import error in unittests
Re #8571 - RestAPI testing
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 - Added get_public_key method to KeyService that extracts a public key from a private key
Re #8579 - Changed conftest.py of service and DAO tests in such way that test_configuration is now used
Re #8569 Fixed broken tests after injection implementation
Re #8473 - Added get_subject_from_certificate to certificate_service.py
Re #8472 - Added further tests of the KeyService class
Re #8472 - Added KeyService.delete test and renamed a test suite
Applied a small change to the KeyService.get_keys method
Re #8472 - Implemented delete_certificate method in CertificateService and added a test validating it
Re #8472 - Implemented get_chain_of_trust method and added an integration test validating it
Added return type specification to read_all method in CertificateRepository
Re #8472 - Implemented get_certificates method and added an integration test validating it
Added fixtures providing a unique DB connection for each test
Re #8472 - Implemented create_end_cert method and added an integration test validating it
Re #8472 - Added the ability to pass usage dictionary to create_ca and create_root_ca methods via optional parameter
Re #8472 - Implemented create_ca method in CertificateService and added test verifying this method's validity
Re #8472 - Implemented get_certificate method in CertificateService and added a test testing this method
Re #8472 - Extended integration test asserting correct reading from the database
Re #8472 - Improved SQL connection/cursor fixtures in such way that connection to DB happens only once per test module