fix compile error

document-manager-server/src/main/java/de/ozgcloud/document/bescheid/smartdocuments/SmartDocumentsConfiguration.java

@@ -91,7 +91,7 @@ class SmartDocumentsConfiguration {
 		return new DefaultProxyRoutePlanner(new HttpHost(properties.getProxy().getHost(), properties.getProxy().getPort()));
 	}
 
-	private CredentialsProvider createProxyCredentialsProvider() {
+	CredentialsProvider createProxyCredentialsProvider() {
 		var host = properties.getProxy().getHost();
 		var port = properties.getProxy().getPort();
 		var username = properties.getProxy().getUsername();