Add basic Helm on GKE example

[robmorgan]

This PR adds a basic example of how to install Helm onto a GKE cluster.

Features

• Stop hard-coding the [email protected] IAM account
• Deploy a test Helm chart.
• Verify that Nginx or whatever chart is listening on a port.
  Use different config files and run tests in parallel.

[yorinasub17]

QQ: c610250

What was the reason for disabling the parallel testing? We should document this so that folks are aware of the gotcha, and make it easier to figure out a fix later.

[yorinasub17]

What was the reason for disabling the parallel testing? We should document this so that folks are aware of the gotcha, and make it easier to figure out a fix later.

For posterity, the reason is because of conflicting kubectl configs. This is a limitation in the current terratest functions. I will be working on a fix, but to avoid blocking the release/merge, we should go ahead with the current version. Looking at CircleCI, this is still 30 mins which is on the borderline of what is "acceptable".

Does that sound reasonable team? (@robmorgan @rileykarson @autero1 ). If that sounds good, please add a comment around the commented out t.Parallel with the above note.

[autero1]

Does that sound reasonable team?

Sounds good to me!

[robmorgan]

Does that sound reasonable team?

Sounds good to me!

Yep, I agree, lets ship and revisit when we work on the private cluster support. By then the updates methods will be in Terratest. 👍