Revert the display names for the CKAN repositories

The names I have looked up, as a possible display name, seem not to be
very useful. I will keep using the formatted URL of a repository.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Add median to the resources per record statistic

Since the Canadian portal has such a large average number of resources
per record I want to investigate further how this is different through
the median. Hence, I have added the median as well. This was easily
achieved by simply adding an ascending call to the criteria.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>