test: flaky box/net.box_huge_data_gh-983.test.lua test

[avtikhon]

Tarantool version:
Tarantool 2.6.0-136-g2711797be8
Target: Linux-x86_64-RelWithDebInfo
Build options: cmake . -DCMAKE_INSTALL_PREFIX=/usr/local -DENABLE_BACKTRACE=ON
Compiler: /usr/bin/clang-8 /usr/bin/clang++-8
C_FLAGS: -Wno-unknown-pragmas -fexceptions -funwind-tables -fno-omit-frame-pointer -fno-stack-protector -fno-common -msse2 -fsanitize=address -fsanitize-blacklist=/builds/4BUsapPU/0/tarantool/tarantool/asan/asan.supp -std=c11 -Wall -Wextra -Wno-strict-aliasing -fsanitize=alignment,bool,bounds,builtin,enum,float-cast-overflow,float-divide-by-zero,function,integer-divide-by-zero,return,shift,unreachable,vla-bound -fno-sanitize-recover=alignment,bool,bounds,builtin,enum,float-cast-overflow,float-divide-by-zero,function,integer-divide-by-zero,return,shift,unreachable,vla-bound -Wno-char-subscripts -Wno-gnu-alignof-expression -Werror
CXX_FLAGS: -Wno-unknown-pragmas -fexceptions -funwind-tables -fno-omit-frame-pointer -fno-stack-protector -fno-common -msse2 -fsanitize=address -fsanitize-blacklist=/builds/4BUsapPU/0/tarantool/tarantool/asan/asan.supp -std=c++11 -Wall -Wextra -Wno-strict-aliasing -fsanitize=alignment,bool,bounds,builtin,enum,float-cast-overflow,float-divide-by-zero,function,integer-divide-by-zero,return,shift,unreachable,vla-bound -fno-sanitize-recover=alignment,bool,bounds,builtin,enum,float-cast-overflow,float-divide-by-zero,function,integer-divide-by-zero,return,shift,unreachable,vla-bound -Wno-char-subscripts -Wno-invalid-offsetof -Wno-gnu-alignof-expression -Werror

OS version:
Linux (Debian 10)

Bug description:
https://gitlab.com/tarantool/tarantool/-/jobs/771333093#L4292

artifacts.zip

results file checksum: cff17b099fe42519c69da09d7a2c6691

[038] --- box/net.box_huge_data_gh-983.result	Wed Aug 26 06:06:15 2020
[038] +++ box/net.box_huge_data_gh-983.reject	Mon Oct  5 00:55:48 2020
[038] @@ -27,4 +27,5 @@
[038]  ...
[038]  box.space.test:drop()
[038]  ---
[038] +- error: 'Can''t drop space ''test'': the space has grants'
[038]  ...
[038] 

Steps to reproduce:

Optional (but very desirable):

• coredump
• backtrace
• netstat