revert shuffle

Signed-off-by: Heng Qian <[email protected]>

build.sbt

@@ -2,8 +2,6 @@
  * Copyright OpenSearch Contributors
  * SPDX-License-Identifier: Apache-2.0
  */
-import scala.util.Random
-
 import Dependencies.*
 
 lazy val scala212 = "2.12.14"
@@ -286,8 +284,7 @@ lazy val integtest = (project in file("integ-test"))
       IntegrationTest / testGrouping := {
         val tests = (IntegrationTest / definedTests).value
         val forkOptions = ForkOptions()
-        // Random shuffle the tests and split them into 3 groups
-        val groups = Random.shuffle(tests).grouped(tests.size / 4 + 1).zipWithIndex.map { case (group, index) =>
+        val groups = tests.grouped(tests.size / 4 + 1).zipWithIndex.map { case (group, index) =>
           val groupName = s"group-${index + 1}"
           new Tests.Group(
             name = groupName,