bgp_gr_helper Test suite Execution Fails in Latest MSFT Sonic Testbed

[DhinakaranDayalan]

Description

Issue:

I was trying to run the bgp_gr_helper test suite form the MSFT Test bed Suite.
bgp_gr_helper.yml

Steps to reproduce the issue:
When I was executing the script the test case failed at the Following Location.

# When RIBD up and send bgp open message it will set F bit to 1. Which means that during restart
# all routes were preserved in FIB. When DUT receives open message with F bit set to 1 it also
# should preserve all routes (no route update should happens).
- name: Force stop RIBD to simulate GR.
  shell: "killall -9 ribd; sleep 0.5; ifconfig et1 down"
  delegate_to: "{{ vm_ip }}"

When I executed with the detailed verbose I see the script is trying to login into the DUT with the User=root
But the lab config file is using login=admin

TASK [test : Force stop RIBD to simulate GR.] **********************************
task path: /var/azure/sonic-mgmt/ansible/roles/test/tasks/bgp_gr_helper.yml:49
Wednesday 25 September 2019 17:18:48 +0000 (0:00:00.997) 0:01:25.666 ***
<10.28.XX.XX> ESTABLISH SSH CONNECTION FOR USER: root
<10.28.XX.XX> SSH: ansible.cfg set ssh_args: (-o)(ControlMaster=auto)(-o)(ControlPersist=120s)(-o)(UserKnownHostsFile=/dev/null)
<10.28.XX.XX> SSH: ANSIBLE_HOST_KEY_CHECKING/host_key_checking disabled: (-o)(StrictHostKeyChecking=no)
<120.228.XX.XX> SSH: ANSIBLE_REMOTE_USER/remote_user/ansible_user/user/-u set: (-o)(User=root)
<120.228.XX.XX> SSH: ANSIBLE_TIMEOUT/timeout set: (-o)(ConnectTimeout=30)
<120.228.XX.XX> SSH: PlayContext set ssh_common_args: ()
<120.228.XX.XX> SSH: PlayContext set ssh_extra_args: ()
<120.228.XX.XX> SSH: found only ControlPersist; added ControlPath: (-o)(ControlPath=/var/azure/.ansible/cp/ansible-ssh-%h-%p-%r)
<120.228.XX.XX> SSH: EXEC sshpass -d15 ssh -C -vvv -o ControlMaster=auto -o ControlPersist=120s -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -o User=root -o ConnectTimeout=30 -o ControlPath=/var/azure/.ansible/cp/ansible-ssh-%h-%p-%r 120.228.XX.XX 'LANG=C LC_ALL=C LC_MESSAGES=C /usr/bin/python'
fatal: [et6448m-M0]: UNREACHABLE! => {"changed": false, "msg": "ERROR! SSH Error: data could not be sent to the remote host. Make sure this host can be reached over ssh", "unreachable": true}

Describe the results you received:
Test Execution Failed

Describe the results you expected:
Test Execution to Pass

Additional information you deem important (e.g. issue happens only occasionally):

**Sonic Management GIT Version**

commit a3f24588b4785263c588211aa88baed228a01509
Author: Stephen Sun [email protected]
Date: Sat Sep 21 00:47:42 2019 +0800

[tests/platform/test_reboot.py] add testcases for reboot cause (#1079)


(paste your output here)
```

**Attach debug file `sudo generate_dump`:**

```
(paste your output here)
```

[wangxin]

@DhinakaranDayalan It looks like there is issue with establishing SSH connection to the PTF host.

fatal: [et6448m-M0]: UNREACHABLE! => {"changed": false, "msg": "ERROR! SSH Error: data could not be sent to the remote host. Make sure this host can be reached over ssh", "unreachable": true}

This task is to be executed on the PTF host.