Thanks for the review, Sergey!
Here is the new commit message, considering your comments:
====================================================================
    test: use CI friendly variables in lua-Harness
 
    In the scope of the commit 45ed138dcb9228d8ac5b8d82331ddd20a0bfada1
    ('test: set USERNAME env var for lua-Harness suite') the environment
    of the testing process is tweaked via CMake, since both LOGNAME and
    USERNAME environment variables might be missing.
 
    Actually, POSIX standard states that every user must have HOME
    environment variable set. It allows to use this variable in
    the corresponding assertion instead of LOGNAME and USERNAME without
    additional environment setup.
 
    As a result this patch[1] from lua-Harness suite supersedes the
    mentioned commit, and the CMake hack can be dropped.
 
    [1]:  https://framagit.org/fperrad/lua-Harness/-/commit/6c2aa87
 
    Part of tarantool/tarantool#5970
    Part of tarantool/tarantool#4473
====================================================================
 
 
 
> 
>>Hi, Maxim!
>>
>>Thanks for the patch!
>>LGTM except a few nits regarding to the commit message.
>>
>>===================================================================
>>    test: use CI friendly variables in lua-Harness
>>
>>    In scope of the commit 45ed138dcb9228d8ac5b8d82331ddd20a0bfada1
>>
>>Typo: s/In scope/In the scope/
>>
>>    ('test: set USERNAME env var for lua-Harness suite') the environment
>>    of the testing process is tweaked via CMake, since both LOGNAME and
>>    USERNAME environment variables might be missing.
>>
>>    Actually, POSIX standard states that every user must have HOME
>>    environment variable set. It allows to use this in the corresponding
>>
>>Typo? s/this/this variable/
>>
>>    assertion instead of LOGNAME and USERNAME without additional
>>    environment setup.
>>
>>    As a result this patch[1] from lua-Harness suite supersedes the
>>    mentioned commit, and CMake hack can be dropped.
>>
>>Typo: s/CMake hack/the CMake hack/
>>
>>
>>    [1]:  https://framagit.org/fperrad/lua-Harness/-/commit/6c2aa87
>>
>>    Part of tarantool/tarantool#5970
>>    Part of tarantool/tarantool#4473
>>===================================================================
>>On 26.07.21, Igor Munkin wrote:
>>> Max,
>>>
>>> Thanks for the fixes! LGTM.
>>>
>>> --
>>> Best regards,
>>> IM
>>--
>>Best regards,
>>Sergey Kaplun
>