OPSMN-3866: Sorted the specimen type counts in decreasing order.
OPSMN-3866: Sorted the specimen type counts in decreasing order.

The specimen type counts were sorted in increasing order and first
5 were picked for display in chart. As a result, the chart displayed
bottom 5 specimen types. Fixed the sorting to use descreasing order so
that the top 5 specimen types are displayed in chart.

krishagni/openspecimen,krishagni/openspecimen,krishagni/openspecimen