HA Instance must be the last

```
/S ZWESLSTC,HAINST=X1
```

If there is additional parameter after the HA instance, it is used as HA:

```jcl
//ZWELNCH  EXEC PGM=ZWELNCH,REGION=&RGN,TIME=NOLIMIT,          
// PARM='ENVAR(_CEE_ENVFILE=DD:STDENV),POSIX(ON)/&HAINST.,ASDF'
```

```
ZWESVUSR INFO ZWEL0024I HA_INSTANCE_ID is 'x1,asdf'
```

Related to #177 