Summary:
SSL_CTX_get_cipher_list() has different semantics when running under
OpenSSL 1.1.1.

This adjusts the tests that explicitly call SSLContext::setCiphers() to only
check expectations against < TLS 1.3 cipher names.

Reviewed By: knekritz

Differential Revision: D17539611

fbshipit-source-id: c293bd1e6b886dbc575a0677a98776d256b23fb5