WinRM metrics have gaps, and collector seems to send metrics after end of session with hub

[sempervictus]

While investigating the gaps in RRD graphs seen on winrm hosts (ssh/snmp hosts do not exhibit the problem, only winrm), noticed what appears to be an attempt to submit the stats after session cleanup to a now indifferent zenhub. Not a proper diagnosis, off the cuff assessment, but the problem

2018-09-26 14:24:55,086 DEBUG zen.collector.scheduler: Cleanup on task configLoader <Products.ZenCollector.config.ConfigurationLoaderTask object at 0x824b650>
2018-09-26 14:24:55,087 DEBUG zen.collector.scheduler: Scheduler._cleanupTaskComplete: result=None task.name=configLoader
2018-09-26 14:24:55,087 DEBUG zen.collector.scheduler: Cleanup on task configLoader <Products.ZenCollector.config.ConfigurationLoaderTask object at 0x824b710>
2018-09-26 14:24:55,087 DEBUG zen.collector.scheduler: Scheduler._cleanupTaskComplete: result=None task.name=configLoader
2018-09-26 14:24:55,087 DEBUG zen.collector.scheduler: Cleanup on task dc0.corp.local 1800 DCDiag dc0.corp.local <__main__.PythonCollectionTask object at 0xa7d04d0>
2018-09-26 14:24:55,087 DEBUG zen.collector.scheduler: Scheduler._cleanupTaskComplete: result=None task.name=dc0.corp.local 1800 DCDiag dc0.corp.local
2018-09-26 14:24:55,087 DEBUG zen.zenpython: Tried to stop reactor that was stopped
2018-09-26 14:24:55,087 INFO zen.zenpython: Daemon CollectorDaemon shutting down
2018-09-26 14:24:55,088 DEBUG zen.zenpython: Sending 25 events, 0 perf events, 0 heartbeats
2018-09-26 14:24:55,138 DEBUG zen.zenpython: Removing service EventService
2018-09-26 14:24:55,138 DEBUG zen.zenpython: Removing service ZenPacks.zenoss.PythonCollector.services.PythonConfig
2018-09-26 14:24:55,139 DEBUG zen.pbclientfactory: Lost connection to localhost:8789 - [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionLost'>: Connection to the other side was lost in a non-clean fashion: Connection lost.
]
2018-09-26 14:24:55,139 DEBUG zen.collector.scheduler: In shutdown stage during
2018-09-26 14:24:55,140 DEBUG zen.collector.scheduler: In shutdown stage after