cloud_aws: Do not demand AWS_ACCESS_KEY_ID nor AWS_SECRET_ACCESS_KEY
cloud_aws: Do not demand AWS_ACCESS_KEY_ID nor AWS_SECRET_ACCESS_KEY

If we use poni on a machine that has credentials file on users home
directory OR on a machine that has instance profile with required
permissions we have no need to have those in the environment.

Minimal set of policy permissions for instance profile so that poni
can be used to deploy on it are.

"ec2:AllocateAddress",
"ec2:AssociateAddress",
"ec2:CreateTags",
"ec2:DescribeAddresses",
"ec2:DescribeImages",
"ec2:DescribeInstanceStatus",
"ec2:DescribeInstances",
"ec2:DescribeSecurityGroups",
"ec2:DescribeSpotInstanceRequests",
"ec2:DescribeSubnets",
"ec2:DescribeVpcs",
"ec2:RunInstances",
"iam:PassRole"

ohmu/poni,ohmu/poni