test: flaky replication/gh-4402-info-errno.test.lua test

[avtikhon]

Tarantool version:
FreeBSD 12

OS version:
Tarantool 2.6.0-121-g6e26af8f3
Target: FreeBSD-amd64-RelWithDebInfo
Build options: cmake . -DCMAKE_INSTALL_PREFIX=/usr/local -DENABLE_BACKTRACE=OFF
Compiler: /usr/bin/cc /usr/bin/c++
C_FLAGS: -Wno-unknown-pragmas -fexceptions -funwind-tables -fno-common -std=c11 -Wall -Wextra -Wno-strict-aliasing -Wno-char-subscripts -Wno-gnu-alignof-expression -Werror
CXX_FLAGS: -Wno-unknown-pragmas -fexceptions -funwind-tables -fno-common -std=c++11 -Wall -Wextra -Wno-strict-aliasing -Wno-char-subscripts -Wno-invalid-offsetof -Wno-gnu-alignof-expression -Werror

Bug description:
https://gitlab.com/tarantool/tarantool/-/jobs/763257004#L4959

artifacts.zip

[007] --- replication/gh-4402-info-errno.result	Tue Sep 29 13:53:35 2020
[007] +++ replication/gh-4402-info-errno.reject	Fri May  8 08:22:07 2020
[007] @@ -52,7 +52,39 @@
[007]   | ...
[007]  d ~= nil and d.system_message ~= nil and d.message ~= nil or i
[007]   | ---
[007] - | - true
[007] + | - version: 2.6.0-121-g6e26af8f3
[007] + |   id: 1
[007] + |   ro: false
[007] + |   uuid: f9f42738-9104-11ea-9e62-08002739cbd6
[007] + |   package: Tarantool
[007] + |   cluster:
[007] + |     uuid: f9fad042-9104-11ea-9e62-08002739cbd6
[007] + |   listen: unix/:/home/vagrant/tarantool/test/var/007_replication/master.socket-iproto
[007] + |   replication_anon:
[007] + |     count: 0
[007] + |   replication:
[007] + |     1:
[007] + |       id: 1
[007] + |       uuid: f9f42738-9104-11ea-9e62-08002739cbd6
[007] + |       lsn: 97
[007] + |     2:
[007] + |       id: 2
[007] + |       uuid: 0106b159-9105-11ea-9e62-08002739cbd6
[007] + |       lsn: 0
[007] + |       downstream:
[007] + |         status: follow
[007] + |         idle: 0.054887151999992
[007] + |         vclock: {1: 97}
[007] + |   signature: 107
[007] + |   status: running
[007] + |   vclock: {0: 10, 1: 97}
[007] + |   uptime: 2
[007] + |   lsn: 97
[007] + |   sql: []
[007] + |   gc: []
[007] + |   vinyl: []
[007] + |   memory: []
[007] + |   pid: 52016
[007]   | ...
[007]  
[007]  box.schema.user.revoke('guest', 'replication')
[007] 

Steps to reproduce:

Optional (but very desirable):

• coredump
• backtrace
• netstat