remove sudo in vm_hostname vm startup script in external_http_lb_mig_backend sample (#167)
remove sudo in vm_hostname vm startup script in external_http_lb_mig_backend sample (#167)

in instance template, remove sudo in vm_hostname startup script as using sudo was not setting vm_hostname variable during startup.
No need to use sudo while setting variable.
terraform-google-modules/terraform-docs-samples,terraform-google-modules/terraform-docs-samples