Use the built in boolean type for CompressionExpected

Don't create a custom boolean type for parsing CompressionExpected. Use
the existing one instead.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2814)
diff --git a/test/ssl_test_ctx.h b/test/ssl_test_ctx.h
index 418a4f2..300a557 100644
--- a/test/ssl_test_ctx.h
+++ b/test/ssl_test_ctx.h
@@ -168,7 +168,7 @@
      */
     ssl_servername_t expected_servername;
     ssl_session_ticket_t session_ticket_expected;
-    ssl_compression_t compression_expected;
+    int compression_expected;
     /* The expected NPN/ALPN protocol to negotiate. */
     char *expected_npn_protocol;
     char *expected_alpn_protocol;
@@ -198,7 +198,6 @@
 const char *ssl_servername_callback_name(ssl_servername_callback_t
                                          servername_callback);
 const char *ssl_session_ticket_name(ssl_session_ticket_t server);
-const char *ssl_compression_name(ssl_compression_t server);
 const char *ssl_test_method_name(ssl_test_method_t method);
 const char *ssl_handshake_mode_name(ssl_handshake_mode_t mode);
 const char *ssl_ct_validation_name(ssl_ct_validation_t mode);