add integration test for (new) ISO-8601 Date Format (FINERACT-926)

using SchedulerJobsTest, just because that's convenient

fineract-provider/src/integrationTest/java/org/apache/fineract/integrationtests/SchedulerJobsTest.java

@@ -25,6 +25,7 @@ import static org.junit.Assert.assertNotNull;
 import io.restassured.builder.RequestSpecBuilder;
 import io.restassured.http.ContentType;
 import io.restassured.specification.RequestSpecification;
+import java.time.format.DateTimeFormatter;
 import java.util.List;
 import java.util.Map;
 import org.apache.fineract.integrationtests.common.SchedulerJobHelper;
@@ -48,6 +49,14 @@ public class SchedulerJobsTest {
         schedulerJobHelper = new SchedulerJobHelper(requestSpec);
     }
 
+    @Test // FINERACT-926
+    public void testDateFormat() {
+        Map<String, Object> schedulerJob1 = schedulerJobHelper.getSchedulerJobById(1);
+        String nextRunTimeText = (String)schedulerJob1.get("nextRunTime");
+        assertNotNull("nextRunTime == null: " + schedulerJob1, nextRunTimeText);
+        DateTimeFormatter.ISO_INSTANT.parse(nextRunTimeText);
+    }
+
     @Test
     public void testFlippingSchedulerStatus() throws InterruptedException {
         // Retrieving Status of Scheduler