Openshift properties related to passwords in EJB_TIMER cannot use literal $n

Customer is using this config map:

```
apiVersion: app.kiegroup.org/v2
kind: KieApp
metadata:
annotations:
app.kiegroup.org: 7.8.1
...
spec:
...
servers:
...
database:
externalConfig:
...
password: foobar$0 #notsecret
```
Openshift RHPAM runs through entrypoint openshift-launch.sh

The yaml template is parsed and set as env variables here and there. finally all end in standalone-openshift.xml

This database password ends in:

```
...
<xa-datasource ...>
...
<security>
...
<password>foobar/opt/eap/bin/openshift-launch.sh</password>
</security>
...
</xa-datasource>
```

Looks like if you use a property like 'foobar$0' $0 gets replaced with script file name.

$0 is the parameter in bash for script file name but only if you put in double quotes.

Looks like we should support that, like property = "$PREFIXfoobar" gets PREFIX replaced.

See:

https://github.com/jboss-container-images/rhpam-7-openshift-image/blob/master/templates/rhpam710-kieserver-postgresql.yaml#L821

```

• name: POSTGRESQL_PASSWORD
  value: "${KIE_SERVER_POSTGRESQL_PWD}"
  ```

In that case maybe check if single quotes prevent the replacement. so one can use 'foobar$0' as literal