Fix WebFluxDslTests for reply size limitation

Author: artembilan

spring-integration-webflux/src/test/java/org/springframework/integration/webflux/dsl/WebFluxDslTests.java

@@ -139,6 +139,9 @@ public void setup() {
 						.apply(SecurityMockServerConfigurers.springSecurity())
 						.configureClient()
 						.responseTimeout(Duration.ofSeconds(10))
+						.codecs(clientCodecConfigurer -> clientCodecConfigurer
+								.defaultCodecs()
+								.maxInMemorySize(1024 * 1024))
 						.build();
 	}