test: flaky box/net.box_count_inconsistent_gh-3262.test.lua test

[avtikhon]

Tarantool version:
Tarantool 2.7.0-48-g27fbff62e
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

OS version:
FreeBSD 12

Bug description:
https://gitlab.com/tarantool/tarantool/-/jobs/856433713#L5318

artifacts.zip

results file checksum: 54cb0a7773f633dc7212a944d43c7b56

[007] --- box/net.box_count_inconsistent_gh-3262.result	Wed Nov 18 05:26:18 2020
[007] +++ var/rejects/box/net.box_count_inconsistent_gh-3262.reject	Fri May  8 08:23:39 2020
[007] @@ -421,7 +421,7 @@
[007]  ...
[007]  cn:eval('return ret_after(...)', {0.01}, { timeout = 1.00 })
[007]  ---
[007] -- [[0.01]]
[007] +- error: Timeout exceeded
[007]  ...
[007]  cn:eval('return ret_after(...)', {1.00}, { timeout = 1e-9 })
[007]  ---
[007] 

Steps to reproduce:

Optional (but very desirable):

• coredump
• backtrace
• netstat