Tests: provide openssl.conf in test_tls_certificate_key_ec.
Tests: provide openssl.conf in test_tls_certificate_key_ec.

Previously, test failed if openssl was unable to load config info,
or the system's openssl.cnf was picked up, which is wrong as well.

nginx/unit,nginx/unit,nginx/unit,nginx/unit,nginx/unit,nginx/unit,nginx/unit,nginx/unit,nginx/unit,nginx/unit,nginx/unit