Fix namespace collision with other nova packages
Need to add __path__ = __import__("pkgutil").extend_path(__path__, __name__) to src/nova/init.py so that the namespace can be shared with the other nova packages.
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Need to add __path__ = __import__("pkgutil").extend_path(__path__, __name__) to src/nova/init.py so that the namespace can be shared with the other nova packages.