TRQ-1794. Add the parameter default_features to queues. The old way of sending all jobs to a specific queue was to set resources_default.neednodes, and then add that property to each of the nodes where jobs for that queue should go. This fell apart if a user requested a feature as part of their nodes request, so adding default_features gives admins a way to overcome this issue.
Merge branch '4.2-dev' of https://github.com/adaptivecomputing/torque into 4.2-dev