Fix #426 with right Spring cron definition.

Author: jmrozanec

src/main/java/com/cronutils/model/definition/CronDefinitionBuilder.java

@@ -317,7 +317,7 @@ private static CronDefinition quartz() {
      * <tr>
      * <td>Day of week</td>
      * <td>YES</td>
-     * <td>1-7 or SUN-SAT</td>
+     * <td>0-7 or SUN-SAT</td>
      * <td>* ? , - /</td>
      * </tr>
      * </table>
@@ -335,7 +335,7 @@ private static CronDefinition spring() {
                 .withHours().withStrictRange().and()
                 .withDayOfMonth().supportsQuestionMark().and()
                 .withMonth().and()
-                .withDayOfWeek().withValidRange(1, 7).withMondayDoWValue(2).supportsQuestionMark().and()
+                .withDayOfWeek().withValidRange(0, 7).withMondayDoWValue(1).withIntMapping(7,0).supportsQuestionMark().and()
                 .instance();
     }
 

src/main/java/com/cronutils/model/time/generator/EveryFieldValueGenerator.java

@@ -65,6 +65,7 @@ public int generateNextValue(final int reference) throws NoSuchValueException {
 
     private int getNext(int reference, Every every) {
         final int offset = offset();
+
         if (reference >= offset) {
             final int referenceWithoutOffset = reference - offset;
             final int period = every.getPeriod().getValue();

src/test/java/com/cronutils/mapper/CronMapperIntegrationTest.java

@@ -64,7 +64,7 @@ public void testRangeOfTimeQuartzToCron4j() {
 
     @Test
     public void testRangeOfTimeQuartzToSpring() {
-        final String expected = "5 0 9-18 ? * 1-3";
+        final String expected = "5 0 9-18 ? * 0-2";
         final String expression = "5 0 9-18 ? * 1-3 1984";
         assertEquals(expected, CronMapper.fromQuartzToSpring().map(quartzParser().parse(expression)).asString());
     }