[SPARK-24950][SQL] DateTimeUtilsSuite daysToMillis and millisToDays fails w/java 8 181-b13

## What changes were proposed in this pull request?

- Update DateTimeUtilsSuite so that when testing roundtripping in daysToMillis and millisToDays multiple skipdates can be specified.
- Updated test so that both new years eve 2014 and new years day 2015 are skipped for kiribati time zones.  This is necessary as java versions pre 181-b13 considered new years day 2015 to be skipped while susequent versions corrected this to new years eve.

## How was this patch tested?
Unit tests

Author: Chris Martin <[email protected]>

Closes apache#21901 from d80tb7/SPARK-24950_datetimeUtilsSuite_failures.

Author: d80tb7

sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DateTimeUtilsSuite.scala

@@ -662,18 +662,18 @@ class DateTimeUtilsSuite extends SparkFunSuite {
     assert(daysToMillis(16800, TimeZoneGMT) === c.getTimeInMillis)
 
     // There are some days are skipped entirely in some timezone, skip them here.
-    val skipped_days = Map[String, Int](
-      "Kwajalein" -> 8632,
-      "Pacific/Apia" -> 15338,
-      "Pacific/Enderbury" -> 9131,
-      "Pacific/Fakaofo" -> 15338,
-      "Pacific/Kiritimati" -> 9131,
-      "Pacific/Kwajalein" -> 8632,
-      "MIT" -> 15338)
+    val skipped_days = Map[String, Set[Int]](
+      "Kwajalein" -> Set(8632),
+      "Pacific/Apia" -> Set(15338),
+      "Pacific/Enderbury" -> Set(9130, 9131),
+      "Pacific/Fakaofo" -> Set(15338),
+      "Pacific/Kiritimati" -> Set(9130, 9131),
+      "Pacific/Kwajalein" -> Set(8632),
+      "MIT" -> Set(15338))
     for (tz <- DateTimeTestUtils.ALL_TIMEZONES) {
-      val skipped = skipped_days.getOrElse(tz.getID, Int.MinValue)
+      val skipped = skipped_days.getOrElse(tz.getID, Set.empty)
       (-20000 to 20000).foreach { d =>
-        if (d != skipped) {
+        if (!skipped.contains(d)) {
           assert(millisToDays(daysToMillis(d, tz), tz) === d,
             s"Round trip of ${d} did not work in tz ${tz}")
         }