Updated warning message for failing to retrieve region data
Updated warning message for failing to retrieve region data

kiranmeduri/amazon-ecs-agent,aws/amazon-ecs-init,kiranmeduri/amazon-ecs-agent,aws/amazon-ecs-agent,aws/amazon-ecs-agent,rjschwei/amazon-ecs-init,kiranmeduri/amazon-ecs-agent,aws/amazon-ecs-init,aws/amazon-ecs-agent,rjschwei/amazon-ecs-init,kiranmeduri/amazon-ecs-agent,aws/amazon-ecs-agent,aws/amazon-ecs-init