When upgrading VMware appliances using the vami configuration interface the update that is available from VMware does not always match the version you want. mounting an ISO to the VM is not always possible (vCloud Director hosted VMs are an example). Follow this procedure to create a temporary repo to make the correct upgrade bundles available during appliance upgrade
In this example the vRA appliance is used to host the repo. Any VMware appliance can be used for this purpose.
1. SCP the upgrade ISO to /tmp on the vRA appliance
2. SSH to the vRA appliance and navigate to the tmp directory

 cd /tmp

3. Create a new directory called repo

Mkdir repo

 4. Type the following to mount the upgrade ISO to the new repo directory

mount -o loop "iso name" repo

 5. Change directory into repo/update

 cd repo/update

 6. Start the python SimpleHTTPServer

 python -m SimpleHTTPServer

 7. Return to the VAMI configuration interface of the appliance that you are upgrading and browse to the Update tab
 8. Click Settings
 9. Change the Update Repository option to Use Specified Repository
 10. For Repository URL enter http://vRA-FQDN:8000
 Note: Enter the FQDN of the appliance you are using. This may not be the vRA appliance
 11. Click Save Settings
 12. Click Status and click Check Updates
 13. The correct version that you copied to the temporary repo should be available to install