Fix the sorting order for packages in package search window.

[reddyashish]

Purpose

This PR is to fix the order in which the packages are sorted. When the sorting order is based on Downloads, LastUpdate and Votes, the order was reverse and incorrect.
Task: https://jira.autodesk.com/browse/DYN-4194

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated

Release Notes

(FILL ME IN) Brief description of the fix / enhacement. Mandatory section

Reviewers

@QilongTang