Hi Team,
I have used the LAVA job definition including deployment data(OS parameter) as debian . As per the deployment_data.py it should export the shell as  /bin/bash but it’s exporting /bin/sh. I am observing this thing after updating LAVA to
 2021.01. 
Below I am giving the job definition file which I used. It will be very helpful if anyone reply on this. Thank you .
  
Job definition
=============
device_type: x86-simatic-slll
job_name: x86-simatic-ipc227e-slll health-check
timeouts:
  job:
    minutes: 20
  action:
    minutes: 20
  connection:
    minutes: 10
priority: medium
visibility: public
tags:
- slll-simatic-ipc-227e-01
actions:
- deploy:
    to: overlay
- boot:
    method: minimal
    reset: true
    failure_retry: 2
    auto_login:
      login_prompt: 'ebsy-isar login:'
      username: root
      password_prompt: 'Password:'
      password: root
    prompts:
    - root@ebsy-isar:~#
    transfer_overlay:
      download_command: wget
      unpack_command: tar -C / -xzf
# TEST_BLOCK
- test:
    timeout:
      minutes: 5
    definitions:
    - repository:
        metadata:
          format: Lava-Test Test Definition 1.0
          name: kernel-version-basic
          description: "check kernel version"
          os:
            - debian 
          scope:
            - functional
        run:
          steps:
            - lava-test-case uname --shell uname -a
      from: inline
      name: kernel-version-inline
      path: inline/kernel-version-basic.yaml
      lava-signal: kmsg
Regards 
Sarath  P T