Terraform should accept jumphost vm admin name

[selvasingh]

Right now, the default is azureuser and is in the variables file. Given that the script accepts admin name for MySQL, let's follow the same approach

[selvasingh]

CLI script prompts for VM admin name

bash-3.2$ source deploy-azurespringcloud-internal.sh 
Enter full UPN of Key Vault Admin: 
12b6d75b-1df0-4356-ba1f-888cae8973d7
Enter MySql Db admin name: 
selvasingh
Enter MySql Db admin password: 
XXX
Enter Jumpbox VM admin name: 
selvasingh
Enter Jumpbox VM admin password: 
XXX
{
  "id": "/subscriptions/1c638cf4-608f-4ee6-b680-c329e824c3a8/resourceGroups/sc-corp-rg",
  "location": "eastus2",
  "managedBy": null,
  "name": "sc-corp-rg",
  "properties": {
    "provisioningState": "Succeeded"
  },
  "tags": null,
  "type": "Microsoft.Resources/resourceGroups"
}

[dapolloxp]

default parameter value has been removed. Jumpbox admin will not be prompted for.