Minor problems with AWS integration guide

[Piotr Tekielak]

Some minor problems with the "AWS IoT Core integration guide" in "Configuring the integration" section:

• In the "Create a Coiote DM REST user" subsection the guide doesn't mention that the created user needs to have a specific client role set (this action can be performed in the RoleMappings tab of the user management). Without it the User won't be able to see most of the panels, such as Device groups.
• The guide could take domains into consideration when explaining how to create users and migrate tasks.
• The guide could explain how to add a newly created device to the specific group

[Piotr Tekielak]

Resolved (by me)