[ro_user] test is failing on 202012 branch

[vadymhlushko-mlnx]

Description
sonic-mgmt/tests/tacacs/test_ro_user.py test is failing on the 202012 branch because there is no ipintutil CLI utility, this utility exists only on the master branch.

Steps to reproduce the issue:

1. Run the py.test tacacs/test_ro_user.py on the 202012 branch image

Describe the results you received:

        for command in commands_direct + commands_indirect:
            allowed = ssh_remote_allow_run(localhost, dutip, creds['tacacs_ro_user'], creds['tacacs_ro_user_passwd'], command)
>           pytest_assert(allowed, "command '{}' not authorized".format(command))
E           Failed: command 'sudo ipintutil' not authorized

Describe the results you expected:
The py.test tacacs/test_ro_user.py test should pass.

Additional information you deem important:

The output of show version:

root@r-tigris-13:/home/admin# show version

SONiC Software Version: SONiC.SONIC.202012.39-e1f8c07_Internal
Distribution: Debian 10.8
Kernel: 4.19.0-12-2-amd64
Build commit: e1f8c07d
Build date: Mon Mar  8 18:46:04 UTC 2021
Built by: sw-r2d2-bot@r-build-sonic-ci02

Platform: x86_64-mlnx_msn3800-r0
HwSKU: ACS-MSN3800
ASIC: mellanox
ASIC Count: 1
Serial Number: MT1937X00527
Uptime: 16:20:38 up 13:24,  1 user,  load average: 4.30, 2.37, 2.49

Docker images:
REPOSITORY                    TAG                                IMAGE ID            SIZE
docker-teamd                  SONIC.202012.39-e1f8c07_Internal   73e571d0e92b        408MB
docker-teamd                  latest                             73e571d0e92b        408MB
docker-nat                    SONIC.202012.39-e1f8c07_Internal   d48ded5ee092        411MB
docker-nat                    latest                             d48ded5ee092        411MB
docker-platform-monitor       SONIC.202012.39-e1f8c07_Internal   7d8206471093        688MB
docker-platform-monitor       latest                             7d8206471093        688MB
docker-orchagent              SONIC.202012.39-e1f8c07_Internal   9f410bc0b0c1        426MB
docker-orchagent              latest                             9f410bc0b0c1        426MB
docker-fpm-frr                SONIC.202012.39-e1f8c07_Internal   eaa3289a8918        426MB
docker-fpm-frr                latest                             eaa3289a8918        426MB
docker-sflow                  SONIC.202012.39-e1f8c07_Internal   59594be34ad6        409MB
docker-sflow                  latest                             59594be34ad6        409MB
docker-syncd-mlnx             SONIC.202012.39-e1f8c07_Internal   c1f81c086c7f        662MB
docker-syncd-mlnx             latest                             c1f81c086c7f        662MB
docker-snmp                   SONIC.202012.39-e1f8c07_Internal   a23f4f74a80c        438MB
docker-snmp                   latest                             a23f4f74a80c        438MB
docker-sonic-telemetry        SONIC.202012.39-e1f8c07_Internal   af7e2fed9586        487MB
docker-sonic-telemetry        latest                             af7e2fed9586        487MB
docker-lldp                   SONIC.202012.39-e1f8c07_Internal   9dc39a559125        438MB
docker-lldp                   latest                             9dc39a559125        438MB
docker-sonic-mgmt-framework   SONIC.202012.39-e1f8c07_Internal   a7102689a7cc        616MB
docker-sonic-mgmt-framework   latest                             a7102689a7cc        616MB
docker-router-advertiser      SONIC.202012.39-e1f8c07_Internal   8eccf750c8a5        398MB
docker-router-advertiser      latest                             8eccf750c8a5        398MB
docker-database               SONIC.202012.39-e1f8c07_Internal   ca17646eb20d        398MB
docker-database               latest                             ca17646eb20d        398MB
docker-dhcp-relay             SONIC.202012.39-e1f8c07_Internal   e3c45eaaf9f1        405MB
docker-dhcp-relay             latest                             e3c45eaaf9f1        405MB

ro_user_run.txt