**Apache Airflow version**: 1.10.12

**Kubernetes version** : 1.17.9

**Environment**:

- **Cloud provider or hardware configuration**: Azure Kubernetes Service
- **OS** (e.g. from /etc/os-release): Linux
- **Install tools**: Helm chart (/chart in repo) 
- **Others**:

**What happened**:
Pod cannot run since `airflow-cleanup-pods` is not in $PATH
```
Error: failed to start container "airflow-cleanup-pods": Error response from daemon: OCI runtime create failed: container_linux.go:349: starting container process caused "exec: \"airflow-cleanup-pods\": executable file not found in $PATH": unknown
```

**What you expected to happen**: 
Cleanup job pod runs

<!-- What do you think went wrong? -->

**How to reproduce it**:
* Deploy Helm Chart
* Manually trigger `airflow-cleanup ` CronJob 
* See it cannot run since `airflow-cleanup-pods` is not in $PATH
airflow/cli/cli_parser.py
),
    ActionCommand(
        name='rotate-fernet-key',
        func=lazy_load_command('airflow.cli.commands.rotate_fernet_key_command.rotate_fernet_key'),
        help='Rotate encrypted connection credentials and variables',
        description=(
            'Rotate all encrypted connection credentials and variables; see '
            'https://airflow.readthedocs.io/en/stable/howto/secure-connections.html'
            '#rotating-encryption-keys'
        ),
        args=(),
    ),
    GroupCommand(
        name="config",
        help='View configuration',
        subcommands=CONFIG_COMMANDS
    ),
    ActionCommand(
        name='info',
        help='Show information about current Airflow and environment',
        func=lazy_load_command('airflow.cli.commands.info_command.show_info'),
        args=(ARG_ANONYMIZE, ARG_FILE_IO, ),
    ),
    ActionCommand(
        name='plugins',
        help='Dump information about loaded plugins',
        func=lazy_load_command('airflow.cli.commands.plugins_command.dump_plugins'),
        args=(),
    ),
    GroupCommand(