rootNamesList is a list of names of entries in user.databases
Action
Connects to the servers associated with the databases in rootNamesList and gets the latest new and changed parts.
Returns
True if the update was successful. Generates a scriptError if there are errors that cause the update to fail.
Notes
Since it's possible that this script itself will be updated as a consequence of being called, you should always use the wrapper function rootUpdates.threadedMultiRootUpdate instead of calling this script directly.