**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
name='upgrade',
        help="Upgrade the metadata database to latest version",
        func=lazy_load_command('airflow.cli.commands.db_command.upgradedb'),
        args=(),
    ),
    ActionCommand(
        name='shell',
        help="Runs a shell to access the database",
        func=lazy_load_command('airflow.cli.commands.db_command.shell'),
        args=(),
    ),
    ActionCommand(
        name='check',
        help="Check if the database can be reached",
        func=lazy_load_command('airflow.cli.commands.db_command.check'),
        args=(),
    ),
)
CONNECTIONS_COMMANDS = (
    ActionCommand(
        name='get',
        help='Get a connection',
        func=lazy_load_command('airflow.cli.commands.connection_command.connections_get'),
        args=(ARG_CONN_ID, ARG_COLOR),
    ),
    ActionCommand(
        name='list',
        help='List connections',
        func=lazy_load_command('airflow.cli.commands.connection_command.connections_list'),
        args=(ARG_OUTPUT, ARG_CONN_ID_FILTER),