Allow sub organization applications to issue tokens to access the resources in sub organizations

[ShanChathusanda93]

Proposed changes in this pull request

• $subject
• Improvement for : Support for creating OAuth 2.0 clients inside B2B organizations for B2B API access wso2/product-is#21208
• OAuth2 application creation will be enabled from Allow OAuth2 application management through DCR in sub organizations #2578
• This improvement will enable the token issuance from those applications through the token endpoint with the following format
  /t/{tenant-domain}/o/{org-id}/oauth2/token?scope=openid...
• Following grant types will be supported in this phase.
  • client_credentials
  • password
  • refresh_token

When should this PR be merged

• Need a kernel level improvement to be merged first and release a kernel version : Introduce application resident organization in carbon context wso2/carbon-kernel#4104
  • Kernel version bump is done in [1] and please make sure that before merging this PR, merge [1].

[1] #2578

[Thumimku]

Hi @ShanChathusanda93,

⚠️ Notice: This PR has been open for a while. To keep the repository clean and up-to-date, this PR will be closed within the next two weeks if there is no further activity.

Please take one of the following actions:

• Merge the PR if it is ready.
• Close the PR if it is no longer relevant.
• Leave a comment explaining why it should remain open and provide an update on its progress.

Your prompt attention to this matter is greatly appreciated. Thank you for your understanding and collaboration! 🙏

[ShanChathusanda93]

Hi @ShanChathusanda93,

⚠️ Notice: This PR has been open for a while. To keep the repository clean and up-to-date, this PR will be closed within the next two weeks if there is no further activity.

Please take one of the following actions:

• Merge the PR if it is ready.
• Close the PR if it is no longer relevant.
• Leave a comment explaining why it should remain open and provide an update on its progress.

Your prompt attention to this matter is greatly appreciated. Thank you for your understanding and collaboration! 🙏

This PR is WIP and will be completed withing next couple of days.

[codecov]

Codecov Report

Attention: Patch coverage is 25.16556% with 113 lines in your changes missing coverage. Please review.

Project coverage is 55.41%. Comparing base (32cb723) to head (1148fcb).
Report is 17 commits behind head on master.

Files with missing lines	Patch %	Lines
...arbon/identity/oauth2/token/AccessTokenIssuer.java	0.00%	14 Missing ⚠️
...on/identity/oauth2/dao/TokenManagementDAOImpl.java	0.00%	12 Missing ⚠️
...2/carbon/identity/oauth2/token/JWTTokenIssuer.java	35.29%	7 Missing and 4 partials ⚠️
...th2/token/handlers/grant/PasswordGrantHandler.java	15.38%	10 Missing and 1 partial ⚠️
...dlers/grant/AbstractAuthorizationGrantHandler.java	44.44%	8 Missing and 2 partials ⚠️
...org/wso2/carbon/identity/oauth2/util/JWTUtils.java	0.00%	10 Missing ⚠️
...carbon/identity/oauth2/dao/AccessTokenDAOImpl.java	22.22%	6 Missing and 1 partial ⚠️
...org/wso2/carbon/identity/oauth2/OAuth2Service.java	50.00%	5 Missing and 1 partial ⚠️
...t/authentication/BasicAuthClientAuthenticator.java	40.00%	5 Missing and 1 partial ⚠️
...client/authentication/OAuthClientAuthnService.java	25.00%	5 Missing and 1 partial ⚠️
... and 5 more

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #2616      +/-   ##
============================================
- Coverage     55.79%   55.41%   -0.38%     
+ Complexity     8446     8382      -64     
============================================
  Files           632      631       -1     
  Lines         48587    49787    +1200     
  Branches       9300     9639     +339     
============================================
+ Hits          27109    27590     +481     
- Misses        17601    18250     +649     
- Partials       3877     3947      +70     

Flag	Coverage Δ
unit	38.69% <25.16%> (-0.30%)	⬇️

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