* Update Shippable integration test groups.
* Update integration test group aliases.
* Rebalance AWS and Azure tests with extra group.
* Rebalance Windows tests with another group.
* Protect AWS credentials from accidental commits
* Improve documentation for IAM policies
* Update ELB tests to be multi region
Allow AZs to reflect the region in which the tests are run.
This will not work for regions with fewer than three AZs,
but those are relatively rare
* Undeprecate ec2_elb_*
* Make ec2_elb* full fledged modules rather than aliases
* Split tests for ec2_elb_lb and elb_classicb_lb
* Change names in documentation of old and new elb modules
Add tests for ec2_elb_lb
This is required for modules that may return a non-zero `rc` value for a
successful run, similar to #24865 for Windows fixing **win_chocolatey**.
We also disable the dependency on `rc` value only, even if `failed` was
set.
Adapted unit and integration tests to the new scheme.
Updated raw, shell, script, expect to take `rc` into account.
