add factory loader

src/test/java/ca/uhn/fhir/jpa/starter/ExampleServerDstu3IT.java

@@ -22,6 +22,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.web.server.LocalServerPort;
 import org.springframework.core.io.ClassPathResource;
+import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.junit.jupiter.SpringExtension;
 
 import java.io.File;