CollectionManagement sample has an IDisposable that doesn't match it's docs

[brettcannon]

If you look at IDisposable in the ManageCollections sample you will notice it says that it's for use in a context manager to call a close() method. But if you look at the actual code there's no call to a close() method. I also didn't find a close() method on the DocumentClient in the SDK docs for the single use of IDisposable in the code. Lastly, in Python's stdlib there is contextlib.closing() for this exact use-case.

[southpolesteve]

Closing this issue due to age. Active development of our Python SDK has moved to https://github.com/Azure/azure-sdk-for-python. We have also released 4.0 which includes many updates and new features. If this issue still needs our attention, please reopen it in the new repository.