Update smoke test cases TC_020 and TC_006 to match search improvements

[SathyaJayabal]

TC_006 and TC_020
topcoder-platform/challenge-api#408

[SathyaJayabal]

@luizrrodrigues , does this fix TC_006 too?

[luizrrodrigues]

@SathyaJayabal Yep.

[SathyaJayabal]

@luizrrodrigues , I still see TC_020 failed on the latest prod smoke test.
https://app.circleci.com/pipelines/github/topcoder-platform/community-app/3002/workflows/404d5278-6ebf-4b4c-ad23-89365924e6e1/jobs/12754

[lakshmiathreya]

@SathyaJayabal @luizrrodrigues - shall we move this out of 1.9.6 so we can close the milestone?

[SathyaJayabal]

verified on prod
https://app.circleci.com/pipelines/github/topcoder-platform/community-app/3121/workflows/c072fd1a-ccfb-4d25-ae20-01c37886c304/jobs/12944