Modify all the plans to use ONE_TO_ONE_EXCHANGE for result distribution operator.
diff --git a/asterix-app/src/test/resources/optimizerts/results/push-project-through-group.plan b/asterix-app/src/test/resources/optimizerts/results/push-project-through-group.plan
index 94273ad..86bcdac 100644
--- a/asterix-app/src/test/resources/optimizerts/results/push-project-through-group.plan
+++ b/asterix-app/src/test/resources/optimizerts/results/push-project-through-group.plan
@@ -1,5 +1,5 @@
 -- DISTRIBUTE_RESULT  |PARTITIONED|
-  -- RANDOM_MERGE_EXCHANGE  |PARTITIONED|
+  -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
     -- STREAM_PROJECT  |PARTITIONED|
       -- ASSIGN  |PARTITIONED|
         -- STREAM_PROJECT  |PARTITIONED|