Add "wait" and "retry" deployment options

ARM template deployment often fails with errors like:

"Another operation is in progress on the selected item. If there is an in-progress operation, please retry after it has finished."

"BMSUserErrorObjectLocked","message":"Another operation is in progress on the selected item."

Just to clarity - this is not a dependency issue. ARM deployment may fail if ,for example, you try to add a VM to an RSV and there is another VM being added at the same time: for a few seconds RSV will not accept new clients and as the result your deployment will fail.

Would like to have an option to pause deployment and/or retry it - may be introduce the "wait" and "retry" deployment conditions, i.e:

```
resource blob 'Microsoft.Storage/storageAccounts/blobServices/containers@2019-06-01' = {
wait: 30
retry: 5
name: '${stg.name}/default/logs'
}
```