formatting fix

Author: deepikaSingh2711

sdm/src/test/java/integration/com/sap/cds/sdm/IntegrationTest_SingleFacet.java

@@ -2,6 +2,7 @@
 
 import static org.junit.jupiter.api.Assertions.*;
 
+import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import java.io.File;
 import java.io.IOException;