Fix Checkstyle violation about import order

Author: artembilan

spring-integration-jdbc/src/test/java/org/springframework/integration/jdbc/lock/JdbcLockRegistryTests.java

@@ -26,6 +26,8 @@
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.locks.Lock;
 
+import javax.sql.DataSource;
+
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
@@ -36,8 +38,6 @@
 import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
 
-import javax.sql.DataSource;
-
 /**
  * @author Dave Syer
  * @author Artem Bilan