201-existing-vnet-to-vnet-peering is not working

https://github.com/Azure/azure-quickstart-templates/tree/master/201-existing-vnet-to-vnet-peering

### Issue Details
Template does not creating peering between VNET1 and VNET2, it creates VNET1 to VNET2 peering but not creating peering between VNET2 and VNET1 and as a result does not deliver what was promised.
### Repro steps (*if necessary, delete otherwise*)
There shall be 2 Resources of type `virtualNetworkPeerings` to work but template has only one

Open the 201-existing-vnet-to-vnet-peering template from the linked directory and inspect its virtualNetworkPeerings resources. Reproduce the deployment if needed, then verify that the template creates both VNET1-to-VNET2 and VNET2-to-VNET1 peerings; done means two peering resources are created and bidirectional peering works.

Written by the indexing model from the issue text.