**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
('--conn-uri',),
    help='Connection URI, required to add a connection without conn_type',
    type=str)
ARG_CONN_TYPE = Arg(
    ('--conn-type',),
    help='Connection type, required to add a connection without conn_uri',
    type=str)
ARG_CONN_HOST = Arg(
    ('--conn-host',),
    help='Connection host, optional when adding a connection',
    type=str)
ARG_CONN_LOGIN = Arg(
    ('--conn-login',),
    help='Connection login, optional when adding a connection',
    type=str)
ARG_CONN_PASSWORD = Arg(
    ('--conn-password',),
    help='Connection password, optional when adding a connection',
    type=str)
ARG_CONN_SCHEMA = Arg(
    ('--conn-schema',),
    help='Connection schema, optional when adding a connection',
    type=str)
ARG_CONN_PORT = Arg(
    ('--conn-port',),
    help='Connection port, optional when adding a connection',
    type=str)
ARG_CONN_EXTRA = Arg(
    ('--conn-extra',),
    help='Connection `Extra` field, optional when adding a connection',