**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='export',
        help='Export all variables',
        func=lazy_load_command('airflow.cli.commands.variable_command.variables_export'),
        args=(ARG_VAR_EXPORT,),
    ),
)
DB_COMMANDS = (
    ActionCommand(
        name='init',
        help="Initialize the metadata database",
        func=lazy_load_command('airflow.cli.commands.db_command.initdb'),
        args=(),
    ),
    ActionCommand(
        name="check-migrations",
        help="Check if migration have finished",
        description=(
            "Check if migration have finished (or continually check until timeout)"
        ),
        func=lazy_load_command('airflow.cli.commands.db_command.check_migrations'),
        args=(ARG_MIGRATION_TIMEOUT,),
    ),
    ActionCommand(
        name='reset',
        help="Burn down and rebuild the metadata database",
        func=lazy_load_command('airflow.cli.commands.db_command.resetdb'),
        args=(ARG_YES,),
    ),
    ActionCommand(