OZG-5413 xta: Use static import

xta-adapter/src/test/java/de/ozgcloud/eingang/xta/XtaApplicationTest.java

 package de.ozgcloud.eingang.xta;
 
-import org.junit.jupiter.api.Assertions;
+import static org.junit.jupiter.api.Assertions.*;
+
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.test.context.ActiveProfiles;
@@ -14,7 +15,7 @@ class XtaApplicationTest {
 	@Test
 	void startup() {
 		// should start without exception;
-		Assertions.assertTrue(true);
+		assertTrue(true);
 	}
 
 }