Add end-to-end tests for project module

[wiktorn]

modules/project examples

Modifying almost all examples in project module allowing to be run as end-to-end tests. The only one left is the one requiring org.

Interesting finding - module fails if no billing account is attached, unless you provide auto_create_network = true. This is probably due to the fact, that provider removes the default network after project is created and this requires compute API, and this is only allowed if billing is attached.

Error: Error enabling the Compute Engine API required to delete the default network: failed to enable services: failed on request preconditions: googleapi: Error 400: Billing account for project '***' is not found. Billing must be enabled for activation of service(s) 'compute.googleapis.com,compute.googleapis.com,compute.googleapis.com' to proceed

I decided to add billing account to all examples

Added one big example using project_create = false to test (hopefully) all cases with data resource in use.

Bug fixes for modules/project

• log sink creation failed as it didn't wait to activate logging service

E2E framework updates

Modifying E2E test framework to provide unique prefix on each test run. This is very useful here, and will be useful in any other areas where global uniqueness is required.

This results in dependency on providing TF_VAR_prefix variable hence making the *.tfvars approach even less comfortable and I lean towards removing it. The problem is, that now the TF_VAR_prefix is needed both in Terraform code and in Python code.

Added new required resources to test harness:

• KMS key id
• group_email

Added support for files= clause in # tftest line to end-to-end tests, to make sure that we are testing the same thing whether running standard testes/examples and test/examples_e2e

Sample E2E tests run

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Checklist

I applicable, I acknowledge that I have:

• Read the contributing guide
• Ran terraform fmt on all modified files
• Regenerated the relevant README.md files using tools/tfdoc.py
• Made sure all relevant tests pass

[ludoo]

Will take me a while to go through this, plz be patient. :)

[ludoo]

very nice, thanks Wiktor