[test] Adding propagate test. Was removed.
[test] Adding propagate test. Was removed.

neurodata/ndstore,openconnectome/open-connectome,openconnectome/open-connectome,openconnectome/open-connectome,openconnectome/open-connectome,openconnectome/open-connectome,neurodata/ndstore,openconnectome/open-connectome,neurodata/ndstore,neurodata/ndstore