My dashboard earning and stats fixes

[LieutenantRoger]

Describe the bug
We changed /stats API in backend, it was originally returning member stats as an object, but now the stats api will return member stats in an array.

the My earning and stats section on My Dashboard is no longer working.

1. We need to define a defaultGroupId in the codebase with value 10, use it to loop the stats array returned from /stats API call, and find the stats object with groupId = defaultGroupId, and use that value to populate any fields that requiring stats info on My Dashboard screen

2. Investigate and fix the My Earnings section.

To Reproduce
Visit www.topcoder.com/my-dashboard directly

Expected behavior
My Earnings and Stats section should display with correct data on it.

Additional context
The work should be done against: feature-earnings-stats

[LieutenantRoger]

Specs attached: https://docs.google.com/document/d/1PpTLByyoXtNpgFjrYODDoaQAp0hdyvJwk93kLDA2Va0/edit?usp=sharing