test: flaky SEGFAULT at replication/box_set_replication_stress.test.lua test

[avtikhon]

Tarantool version:
Tarantool 2.5.0-32-g7f20272ea
Target: Darwin-x86_64-RelWithDebInfo
Build options: cmake . -DCMAKE_INSTALL_PREFIX=/usr/local -DENABLE_BACKTRACE=ON
Compiler: /Library/Developer/CommandLineTools/usr/bin/cc /Library/Developer/CommandLineTools/usr/bin/c++
C_FLAGS: -Wno-unknown-pragmas -fexceptions -funwind-tables -fno-omit-frame-pointer -fno-stack-protector -fno-common -msse2 -std=c11 -Wall -Wextra -Wno-strict-aliasing -Wno-char-subscripts -Werror
CXX_FLAGS: -Wno-unknown-pragmas -fexceptions -funwind-tables -fno-omit-frame-pointer -fno-stack-protector -fno-common -msse2 -std=c++11 -Wall -Wextra -Wno-strict-aliasing -Wno-char-subscripts -Werror

OS version:
OSX

Bug description:
https://gitlab.com/tarantool/tarantool/-/jobs/555759472
https://gitlab.com/tarantool/tarantool/-/jobs/555869634

 Segmentation fault
   code: 0
   addr: 0x0
 2020-05-17 04:08:25.693 [26149] iproto sio.c:268 !> SystemError writev(1), called on fd 76, aka unix/:/private/tmp/tnt/065_replication/master_quorum: Broken pipe
   context: 0x11807fca0
   siginfo: 0x11807fc38
 Current time: 1589677705
 Please file a bug at http://github.com/tarantool/tarantool/issues
 Attempting backtrace... Note: since the server has already crashed, 
 this may fail as well
 2020-05-17 04:08:25.693 [26149] iproto sio.c:268 !> SystemError writev(1), called on fd 75, aka unix/:/private/tmp/tnt/065_replication/master_quorum: Broken pipe
 2020-05-17 04:08:25.693 [26149] iproto sio.c:268 !> SystemError writev(1), called on fd 72, aka unix/:/private/tmp/tnt/065_replication/master_quorum: Broken pipe
 2020-05-17 04:08:25.693 [26149] iproto sio.c:268 !> SystemError writev(1), called on fd 71, aka unix/:/private/tmp/tnt/065_replication/master_quorum: Broken pipe
 2020-05-17 04:08:25.693 [26149] iproto sio.c:268 !> SystemError writev(1), called on fd 68, aka unix/:/private/tmp/tnt/065_replication/master_quorum: Broken pipe
 2020-05-17 04:08:25.693 [26149] iproto sio.c:268 !> SystemError writev(1), called on fd 67, aka unix/:/private/tmp/tnt/065_replication/master_quorum: Broken pipe
 2020-05-17 04:08:25.693 [26149] iproto sio.c:268 !> SystemError writev(1), called on fd 64, aka unix/:/private/tmp/tnt/065_replication/master_quorum: Broken pipe
 #0  0x10be1f1d9 in print_backtrace+9
 tarantool/tarantool#1  0x10c051851 in _ZL12sig_fatal_cbiP9__siginfoPv+141
 tarantool/tarantool#2  0x7fff6ca075fd in _sigtramp+1d
 2020-05-17 04:08:25.693 [26149] iproto sio.c:268 !> SystemError writev(1), called on fd 63, aka unix/:/private/tmp/tnt/065_replication/master_quorum: Broken pipe

Steps to reproduce:

Optional (but very desirable):

• coredump
• backtrace
• netstat