Unable to delete mu created environments

[emcfins]

$ mu env term acceptance
Loaded extension backend-service (version=1)
Terminating Services for environment 'acceptance' ...
Terminating Databases for environment 'acceptance' ...
Terminating ECS environment 'acceptance' ...
func1 ▶ ERROR ValidationError: Role arn:aws:iam::423786275406:role/mu-b4-cloudformation-common-us-west-2 is invalid or cannot be assumed
status code: 400, request id: 71be1686-3e87-11e8-a599-bb4d4f35654a

I get the same error when I try to delete the cfn stack through the cfn console

[brentley]

fixed in brentley/ecsdemo-platform@fa96ad7