Log Message:
1.7.3
api-change:ssm: Update ssm client to latest version
api-change:mobile: Update mobile client to latest version
api-change:gamelift: Update gamelift client to latest version

1.7.2
api-change:codebuild: Update codebuild client to latest version
api-change:ec2: Update ec2 client to latest version
api-change:elbv2: Update elbv2 client to latest version
api-change:lex-models: Update lex-models client to latest version

1.7.1
api-change:application-autoscaling: Update application-autoscaling client to \ 
latest version
api-change:organizations: Update organizations client to latest version

1.7.0
api-change:ec2: Update ec2 client to latest version
feature:Waiter: Expose configurable waiter interface
api-change:config: Update config client to latest version