medium: Terraform Optional Attributes and Defaults - no default lambdas vars

terraform.tfvars

# Gross
lambdas = {
  my_lambda_1 = {
    lambda_name       = "my_lambda_1",
    lambda_entrypoint = "my_lambda_1.lambda_handler",
    timeout           = 900,
    lambda_runtime    = "python3.7",
    lambda_memory_size = 256
  }
  my_lambda_2 = {
    lambda_name       = "my_lambda_2",
    lambda_entrypoint = "my_lambda_2.lambda_handler",
    timeout           = 900,
    lambda_runtime    = "python3.7",
    lambda_memory_size = 256
  }
  my_lambda_3 = {
    lambda_name        = "my_lambda_3",
    lambda_entrypoint  = "my_lambda_3.lambda_handler",
    timeout           = 900,
    lambda_runtime    = "python3.7",
    lambda_memory_size = 384
  }
}