Incorrect permissions to enable post-launch actions

[Kirizan]

Describe the bug
The permissions defined for the role CMF-MGNAutomation deployed to the target accounts is missing permissions required to run post-launch actions.

To Reproduce
Follow instructions here to remove vmware tools.

When a test cutover runs, the following error appears:

An error occurred (AccessDeniedException) when calling the GetDocument operation: User: arn:aws:sts:::assumed-role/CMF-MGNAutomation/cloud-migration-factory-prod-MGNLambdaRole is not authorized to perform: ssm:GetDocument on resource: arn:aws:ssm:us-east-1::document/AWS-RunPowerShellScript because no identity-based policy allows the ssm:GetDocument action

The ssm:GetDocument is not the only missing action, adding the ssm:GetDocument permission leads to the two following actions being missing also:

• ssm:SendCommand
• ssm:StartSession

Expected behavior
I expect the post-launch actions to run.

Please complete the following information about the solution:

• Version: 3.3.4

To get the version of the solution, you can look at the description of the created CloudFormation stack. For example, "(SO0097) - AWS CloudEndure Migration Factory Solution. Version v1.1.0".

• Region: us-east-1
• [No] Was the solution modified from the version published on this repository?
• [N/A] If the answer to the previous question was yes, are the changes available on GitHub?
• [N/A] Have you checked your service quotas for the sevices this solution uses?
• Were there any errors in the CloudWatch Logs?

Screenshots
None

Additional context
PR Incoming to fix these issues.

[Kirizan]

I discovered that ssm:ListCommandInvocations was also missing from the list, so I added that to the PR.

[Kirizan]

I forgot to mention, the PR I submitted is based on the 3.3.5 template, not the 3.3.4 template. The only difference is the 3.3.5 template had already added the ssm:GetDocument permission in the policy MGNPostLaunchActions.

[tbelmega]

Thank you for bringing this to our attention! We're looking into it!