Update sampleec2.tf

1 job for master in 12 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Provision
failed #61604
rr
provision

00:00:12

 
Name Stage Failure
failed
provision Provision

on samplerole.tf line 22, in resource "aws_iam_role" "role_name":
22: name =
var.role_name

An input variable with the name "role_name" has not been declared. This
variable can be declared with a variable "role_name" {} block.

Cleaning up project directory and file based variables
ERROR: Job failed: exit status 1