* Move profile and region checking to module_utils.ec2
Remove ProfileNotFound checking from individual modules
There are plenty of `if not region:` checks that could be removed,
once more thorough testing of this change has occured
The ec2_asg, iam_managed_policy and ec2_vpc_subnet_facts modules
would also benefit from this change but as they do not have tests
and are marked stableinterface, they do not get this change.
* Module option metadata are extra arguments rather than S3 object metadata: update ExtraArgs variable.
* Remove hyphens from ExtraArgs to maintain backwards compatibility
* Map lowercase extra args to CamelCase
* Maintain backwards compatibility by guessing at content type rather than always defaulting to binary/octet-stream.
* Fix ExtraArgs for non-hyphenated options
* Simplify logic
* Replace pause in integration tests with until.
Use resource prefix instead of generating a random number
Only try to delete keys if they exist
* Add alias to tests