Check if there are duplicated dataset

[vigliensoni]

There is the possibility that a dataset can be added from the original institution (e.g., an institution within a city) and also by a repository of datasets (e.g., the repository of a city).

There should be a routine to search for, and remove, duplicated datasets.

An example of this behaviour are the datasets

http://serverURL/dataset/parks-off-leash
http://serverURL/dataset/parks-off-leash1