Run instances with particular roles

Need to create roles for each user and use it for running instances.
On launching instance and forming request, an instance profile can be set: [code of the profile class](https://github.com/aws/aws-sdk-java/blob/2491dbbf31ac0b2a9920a90c719c8c322b1af3a2/src/main/java/com/amazonaws/services/ec2/model/IamInstanceProfileSpecification.java#L21) and [request class code](https://github.com/aws/aws-sdk-java/blob/2491dbbf31ac0b2a9920a90c719c8c322b1af3a2/src/main/java/com/amazonaws/services/ec2/model/RunInstancesRequest.java#L179)