fix(auth): add client_id to the refresh request

[alain-charles]

According to RFC4749, client_id has to be present in the body of token request with refresh_token grant_type and no client auth.

Verified on Keyclock 4.X - Invalid_credentials error if client_id is not passed, even if client is not confidential (i.e. without client-secret)

[codecov]

Codecov Report

Merging #2350 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2350   +/-   ##
=======================================
  Coverage   78.94%   78.94%           
=======================================
  Files         253      253           
  Lines        7770     7770           
  Branches      852      852           
=======================================
  Hits         6134     6134           
  Misses       1371     1371           
  Partials      265      265           

Impacted Files	Coverage Δ
...ramework/auth/strategies/oauth2/oauth2-strategy.ts	83.57% <ø> (ø)

[alain-charles]

Hi @nnixaa
Can you please have a look at this pull request and tell me what you think about it ?
Regards
Alain

[yggg]

Thanks @alain-charles!