Error running test-network/scripts/pkgcc.sh script

There's a hard coded filename at the end of the `test-network/scripts/pkgcc.sh` script which results in an error when using a different label

```
shasum: audit-trail.tgz: No such file or directory
```

It would be good to delete this script completely if possible and replace it with one of the following...

- CCaaS/custom chaincode package support in the current `peer` command
- CCaaS/custom chaincode package support in the new Fabric cli command hyperledger/fabric-cli#39
- A working `pkgccaas.sh` script, or more generic `pkgcc.sh` script somewhere common in `fabric-samples` or the main `fabric` repo