only disable DateTime unit test on Java 8

Signed-off-by: David Cui <[email protected]>

core/src/test/java/org/opensearch/sql/expression/datetime/DateTimeFunctionTest.java

@@ -27,8 +27,9 @@
 import java.util.List;
 import lombok.AllArgsConstructor;
 import org.junit.jupiter.api.BeforeEach;
-import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.condition.DisabledOnJre;
+import org.junit.jupiter.api.condition.JRE;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.mockito.Mock;
 import org.mockito.junit.jupiter.MockitoExtension;
@@ -960,7 +961,7 @@ public void year() {
  assertEquals(integerValue(2020), eval(expression));
  }
 
- @Disabled
+ @DisabledOnJre(JRE.JAVA_8)
  @Test
  public void date_format() {
  dateFormatTesters.forEach(this::testDateFormat);