message: Allow setting a fake CipherSuite to FakeServerHandshake
  Summary:
  everything so fake
  (Note: this ignores all push blocking failures!)
diff: @@ -533,6 +533,10 @@ class FakeServerHandshake : public FizzServerHandshake {
  sourceAddrs_ = std::move(srcAddrs);
  }
  + void setCipherSuite(fizz::CipherSuite cipher) {
  + state_.cipher() = cipher;
  + }
  +
  QuicServerConnectionState& conn_;
  bool chloSync_{false};
  bool cfinSync_{false};
  