fix(IoT): Fixing a potential race condition in the timer ring queue #627

Job	Run time
Unit Test (AWSAPIGateway)	4m 31s
Unit Test (AWSAutoScaling)	5m 25s
Unit Test (AWSCloudWatch)	4m 12s
Unit Test (AWSCognitoAuth)	3m 46s
Unit Test (AWSCognitoIdentityProvider)	4m 56s
Unit Test (AWSComprehend)	7m 51s
Unit Test (AWSConnect)	7m 3s
Unit Test (AWSConnectParticipant)	7m 48s
Unit Test (AWSCore)	9m 57s
Unit Test (AWSDynamoDB)	4m 52s
Unit Test (AWSEC2)	5m 10s
Unit Test (AWSElasticLoadBalancing)	6m 11s
Unit Test (AWSIoT)	6m 4s
Unit Test (AWSKMS)	3m 24s
Unit Test (AWSKinesis)	2m 54s
Unit Test (AWSKinesisVideo)	5m 54s
Unit Test (AWSKinesisVideoArchivedMedia)	4m 4s
Unit Test (AWSKinesisVideoSignaling)	5m 5s
Unit Test (AWSKinesisVideoWebRTCStorage)	3m 20s
Unit Test (AWSLambda)	6m 11s
Unit Test (AWSLex)	5m 10s
Unit Test (AWSLogs)	3m 37s
Unit Test (AWSMachineLearning)	3m 49s
Unit Test (AWSMobileClient)	5m 15s
Unit Test (AWSPinpoint)	6m 33s
Unit Test (AWSPolly)	7m 29s
Unit Test (AWSRekognition)	4m 31s
Unit Test (AWSS3)	4m 38s
Unit Test (AWSSES)	5m 9s
Unit Test (AWSSNS)	5m 3s
Unit Test (AWSSQS)	2m 46s
Unit Test (AWSSageMakerRuntime)	3m 43s
Unit Test (AWSSimpleDB)	4m 12s
Unit Test (AWSTextract)	3m 55s
Unit Test (AWSTranscribe)	3m 41s
Unit Test (AWSTranscribeStreaming)	7m 51s
Unit Test (AWSTranslate)	3m 56s
Unit Test (AWSLocation)	6m 18s
Unit Test (AWSChimeSDKMessaging)	6m 56s
Unit Test (AWSChimeSDKIdentity)	3m 20s
	3h 26m 30s

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