Anis Elleuch 9439dfef64 Use defer style to stop tickers to avoid current/possible misuse (#5883)
This commit ensures that all tickers are stopped using defer ticker.Stop()
style. This will also fix one bug seen when a client starts to listen to
event notifications and that case will result a leak in tickers.
2018-05-04 10:43:20 -07:00
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