upgrade v.0.12.0: upgraded examples

[alexkonkin]

Regarding the StackDriver example:

As soon as all documented setup steps were applied
and terraform apply command was executed, the error below was returned:

export TF_VAR_service_account_email="please-delete-me1@project1-243507.iam.gserviceaccount.com" && export TF_VAR_project="project1-243507"

Error: project: required field is not set

on main.tf line 17, in resource "google_project_iam_member" "monitoring-log_writer":
17: resource "google_project_iam_member" "monitoring-log_writer" {
project mandatory variable is missing...

setup of this variable via the environment also failed (see the example below):
export TF_VAR_project="project1-243507"

After the 2-nd attempt the variables.tf file was extended and project variable
was added to it and to the main.tf file, which allowed to get rid of the error above.

Regarding the Organization:
I don't have permission to create organizations, I was able to check
this example only till the
terraform apply
step

[aaron-lane]

Thanks @alexkonkin!

Fixes #27.