GeezerVison

These are two fixes for random hangs found internally.

The first fix (job.cs) is for data stream Close calls on PSDataCollection objects because the method also raises public events. If an exception is thrown on the event handler then the thread never completes job clean up causing a hang. Fix is to catch all thrown exceptions and report.

The second (invokecommandcommand.cs) fixes a hang scenario where a remote job goes into disconnected state while simultaneously handling an exception. Fix is to use try/finally pattern to ensure Invoke-Command can always complete with jobs in the disconnected state.