add seed for test that failed

Author: brkyvz

sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/ConstantFoldingSuite.scala

@@ -160,15 +160,15 @@ class ConstantFoldingSuite extends PlanTest {
     val originalQuery =
       testRelation
         .select(
-          Rand() + Literal(1) as Symbol("c1"),
+          Rand(5L) + Literal(1) as Symbol("c1"),
           Sum('a) as Symbol("c2"))
 
     val optimized = Optimize.execute(originalQuery.analyze)
 
     val correctAnswer =
       testRelation
         .select(
-          Rand() + Literal(1.0) as Symbol("c1"),
+          Rand(5L) + Literal(1.0) as Symbol("c1"),
           Sum('a) as Symbol("c2"))
         .analyze