ECS log configuration argument is overwritten with awslogs defaults

I believe this extension suffers from an issue that was found in the dotnet CLI plugins.

https://github.com/aws/aws-extensions-for-dotnet-cli/issues/184

The issue names no repository file or test; begin by reading the linked dotnet CLI issue 184 and tracing ECS log configuration handling. Reproduce how the supplied log configuration is overwritten by awslogs defaults, then identify the relevant code and tests. Done means the supplied configuration is preserved instead of being replaced by those defaults.

Written by the indexing model from the issue text.