fix: naming convention for bastion, route table and route outputs and template formatting

[johnmckenna]

As per: https://learn.microsoft.com/en-us/azure/cloud-adoption-framework/ready/azure-best-practices/resource-abbreviations

Bastion is bas
Route Table is rt
Route is udr

tflint was complaining as well when running make so I have added a line to the template as well to fix this, this was the error:

1 issue(s) found:

Warning: terraform "required_version" attribute is required (terraform_required_version)

  on main.tf line 1:
   1: terraform {

Reference: https://github.com/terraform-linters/tflint-ruleset-terraform/blob/v0.9.1/docs/rules/terraform_required_version.md

make: *** [Makefile:28: validate] Error 2``

Fix template formatting as well so it matches terraform fmt by removing spaces

Fixes #142

[kstergiopoulos]

Yes this should fix it.