EKS - Add support for CloudWatch logging

As of EKS 1.12, CloudWatch logging has been added as an optional feature. Cloudformation has support for this but it is not yet available in troposphere.

• Add support for the logging parameter as per the following documentation:

See reference docs:

• https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-eks-cluster.html
• https://docs.aws.amazon.com/eks/latest/userguide/control-plane-logs.html

Changes required in troposphere/troposphere/eks.py

Add a new AWSProperty class for logging and within it resource structre based on above docs e.g.

{'clusterLogging': [{'enabled': True,
                     'types': ['api',
                               'audit',
                               'authenticator',
                               'controllerManager',
                               'scheduler']}]}

[markpeek]

I have a small handful of services to convert over to auto-generated. Hoping to get it done over the weekend for a release.

[crbetts1]

Would like an update on this as well. I see that changes were pushed on this commit 6a998b7fd7c404a80d46e9f3d796fd71c3e378fd Is there a timeline on when a tag will be released that includes this change? Thanks