Set FTPSClient property once

The `sessionCreation` property was being set twice by accident.

Author: Sintendo

spring-integration-ftp/src/main/java/org/springframework/integration/ftp/session/DefaultFtpsSessionFactory.java

@@ -150,7 +150,6 @@ protected void postProcessClientBeforeConnect(FTPSClient ftpsClient) {
 			.acceptIfNotNull(this.protocols, ftpsClient::setEnabledProtocols)
 			.acceptIfNotNull(this.sessionCreation, ftpsClient::setEnabledSessionCreation)
 			.acceptIfNotNull(this.useClientMode, ftpsClient::setUseClientMode)
-			.acceptIfNotNull(this.sessionCreation, ftpsClient::setEnabledSessionCreation)
 			.acceptIfNotNull(this.keyManager, ftpsClient::setKeyManager)
 			.acceptIfNotNull(this.needClientAuth, ftpsClient::setNeedClientAuth)
 			.acceptIfNotNull(this.wantsClientAuth, ftpsClient::setWantClientAuth);