Use m2m token on community app

[sushilshinde]

Replacing direct API calls to get m2m token with the library (tc-core-library-js)

[sushilshinde]

#123

[lakshmiathreya]

@sushilshinde - Milestone pls ...

[SathyaJayabal]

tracked in #3522

[LieutenantRoger]

The related issue has been resolved.

[SathyaJayabal]

verified in prod through #3522 in community app