Dal/support for instance profiles

[daniel-lohausen-consilica]

Asume a role without the need to provide ACCESS KEY ID/SECRET KEY

Description

One can now create a service connection without ACCESS KEY ID/SECRET KEY, but only a role to assume.

** IMPORTANT - We used the package.json from the 1.13 release for testing, we were otherwise blocked by #522

Motivation

When using EC2 instance profiles or ECS roles, it is common that the instance/container running the agent is only allowed to assume a role , which than grants other permissions. This use-case was not covered previously

Related Issue(s), If Filed

#511
#424

Testing

• Ran all automated tests
• Manually tested in a test environment

Checklist

• [x ] I have read the README document
• [x ] I have read the CONTRIBUTING document
• [x ] My code follows the code style of this project
• I have added tests to cover my changes
• x[ ] A short description of the change has been added to the changelog using the script npm run newChange

License

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[rbbarad]

@daniel-lohausen-consilica Apologies about the delay, but things are looking good on my end after some manual testing! Thanks for the contribution!