Implement Descending Sorting for Packages and Vulnerabilities in API and UI

[NucleonGodX]

#1754

Used aliases to sort vulnerabilities in descending order and implemented version-based sorting for packages in both the API and UI.

[pombredanne]

Thanks! do you mind to add some tests?

In particular we need to make sure that this does not impact performance badly so the perf there at scale need to be in a test.

[NucleonGodX]

Thanks! do you mind to add some tests?

In particular we need to make sure that this does not impact performance badly so the perf there at scale need to be in a test.

Hey @pombredanne, How can we perform those tests?

[Dedsec0098]

Hey @NucleonGodX , I think @pombredanne wants you to add "Unit Test" for your changes. To make those unit tests you need to make a new test file at vulnerabilities/tests for your specific test for example as said above "to make sure that this does not impact performance badly".