OZG-4949 Clear Monogdb before each test instead of after

src/test/java/de/ozgcloud/admin/settings/postfach/PostfachITCase.java

@@ -8,7 +8,6 @@ import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.
 import java.util.List;
 
 import org.apache.commons.lang3.StringUtils;
-import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
@@ -52,7 +51,7 @@ class PostfachITCase {
 			.settingsBody(PostfachTestFactory.create())
 			.build();
 
-	@AfterEach
+	@BeforeEach
 	void clear() {
 		mongoOperations.dropCollection(Settings.class);
 	}
@@ -236,7 +235,6 @@ class PostfachITCase {
 
 		@BeforeEach
 		void init() {
-			mongoOperations.dropCollection(Settings.class);
 			id = mongoOperations.save(settingsWithPostfach).getId();
 		}