
Previously, all node vendor passthru methods required an exclusive lock on the node to validate and start the task. This allows node vendor passthru methods to specify require_exclusive_lock=False in their passthru decorators to let the conductor acquire a shared lock on a node. Change-Id: I43cf43bc5c17f44a735e16c3c5cb744cf6911d27 Closes-Bug: #1481665