**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='next-execution',
        help="Get the next execution datetimes of a DAG",
        description=(
            "Get the next execution datetimes of a DAG. It returns one execution unless the "
            "num-executions option is given"
        ),
        func=lazy_load_command('airflow.cli.commands.dag_command.dag_next_execution'),
        args=(ARG_DAG_ID, ARG_SUBDIR, ARG_NUM_EXECUTIONS),
    ),
    ActionCommand(
        name='pause',
        help='Pause a DAG',
        func=lazy_load_command('airflow.cli.commands.dag_command.dag_pause'),
        args=(ARG_DAG_ID, ARG_SUBDIR),
    ),
    ActionCommand(
        name='unpause',
        help='Resume a paused DAG',
        func=lazy_load_command('airflow.cli.commands.dag_command.dag_unpause'),
        args=(ARG_DAG_ID, ARG_SUBDIR),
    ),
    ActionCommand(
        name='trigger',
        help='Trigger a DAG run',
        func=lazy_load_command('airflow.cli.commands.dag_command.dag_trigger'),
        args=(ARG_DAG_ID, ARG_SUBDIR, ARG_RUN_ID, ARG_CONF, ARG_EXEC_DATE),
    ),
    ActionCommand(