Folded "DynamoViewModel.Exit" into "updateManager_ShutdownRequested"
marked bad list test as failure
Fix to handle longest lacing on empty arrays

It used to crash, it now doesn't execute the function

http://adsk-oss.myjetbrains.com/youtrack/issue/MAGN-4566
RecordedTest/CodeBlockNodeTest do not need to "shutdown the host"
Removed unwanted argument from "DynamoModel.ShutDown" method
Updated signature of "ShutdownRequestedEventHandler" delegate
Merge pull request #2436 from Benglin/MinorCleanUp

Clean-up of DynamoModel.ShutDown methods
Merge pull request #2435 from DynamoDS/LongestLacingFix

Fix to handle longest lacing on empty arrays