Reduce number of timezones in the test

Author: MaxGekk

sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/JsonExpressionsSuite.scala

@@ -19,6 +19,8 @@ package org.apache.spark.sql.catalyst.expressions
 
 import java.util.Calendar
 
+import scala.util.Random
+
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.errors.TreeNodeException
@@ -510,7 +512,7 @@ class JsonExpressionsSuite extends SparkFunSuite with ExpressionEvalHelper with
     )
 
     val jsonData2 = """{"t": "2016-01-01T00:00:00"}"""
-    for (tz <- DateTimeTestUtils.ALL_TIMEZONES) {
+    for (tz <- Random.shuffle(DateTimeTestUtils.ALL_TIMEZONES).take(8)) {
       c = Calendar.getInstance(tz)
       c.set(2016, 0, 1, 0, 0, 0)
       c.set(Calendar.MILLISECOND, 0)