Change MergeWith function to support NoRandomDuplicates

Author: allenshen13

stage/stage_utils.go

@@ -68,6 +68,9 @@ func (s *Stage) MergeWith(other *Stage) *Stage {
 	if other.RandomExecution != nil {
 		s.RandomExecution = other.RandomExecution
 	}
+	if other.NoRandomDuplicates != nil {
+		s.NoRandomDuplicates = other.NoRandomDuplicates
+	}
 	if other.RandomlyExecuteUntil != nil {
 		s.RandomlyExecuteUntil = other.RandomlyExecuteUntil
 	}