test: replication/wal_rw_stress.test.lua fails after group of tests

[avtikhon]

Tarantool version:
2.6.0-52-g71a24b9f2

OS version:
OSX

Bug description:
Issue:

--- replication/wal_rw_stress.result	Sat Sep  5 11:19:03 2020
+++ var/001_replication/wal_rw_stress.result	Sat Sep  5 17:46:17 2020
@@ -88,23 +88,3 @@
 ---
 ...
 test_run:cmd("stop server replica")
----
-- true
-...
-test_run:cmd("cleanup server replica")
----
-- true
-...
-test_run:cmd("delete server replica")
----
-- true
-...
-test_run:cleanup_cluster()
----
-...
-box.schema.user.revoke('guest', 'replication')
----
-...
-s:drop()
----
-...

Steps to reproduce:

cat 001_replication.passed.yaml 
- [replication/local_spaces.test.lua, vinyl]
- [replication/qsync_basic.test.lua, memtx]
- [replication/wal_rw_stress.test.lua, null]

./test-run.py --reproduce 001_replication.passed.yaml

Optional (but very desirable):

• coredump
• backtrace
• netstat