Allow access to the tenant perspective APIs

[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
• From this fix the organization related APIs can be executed from the tenant perspective for the allowed endpoints which are configured as follows.

<OrgContextsToRewriteInTenantPerspective>
    <WebApp>
        <Context>
            <BasePath>/api/</BasePath>
            <SubPaths>
                <Path>/api/identity/oauth2/dcr/</Path>
            </SubPaths>
        </Context>
        <Context>
            <BasePath>/oauth2/</BasePath>
            <SubPaths>
                <Path>/oauth2/token</Path>
                <Path>/oauth2/introspect</Path>
            </SubPaths>
        </Context>
    </WebApp>
</OrgContextsToRewriteInTenantPerspective>

• DCR endpoint will create the OAuth2 applications in the sub organization level
  • Path : /t/{tenant-domain}/o/{org-id}/api/identity/oauth2/dcr/v1.1/register
• Token generation and introspection
  • Path : /t/{tenant-domain}/o/{org-id}/oauth2/token?scope=openid ...
• When access tokens are handled the tokens will be handled from the sub organization level by checking the type of the application which are using the token service.

When should this PR be merged

• This PR needs to be merged once a new kernel version is released with the changes in : Introduce application resident organization in carbon context wso2/carbon-kernel#4104

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 3.66%. Comparing base (ae652ff) to head (3f84931).
Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff            @@
##             master    #298   +/-   ##
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  Coverage      3.66%   3.66%           
  Complexity       20      20           
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  Files            36      36           
  Lines          1529    1529           
  Branches        254     254           
========================================
  Hits             56      56           
  Misses         1472    1472           
  Partials          1       1           

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[AnuradhaSK]

Suggested change

	Pattern.compile("^/t/[^/]+/o/[a-f0-9\\-]+" + subPath)));
	Pattern.compile("^/t/[^/]+/o/[a-z0-9\\-]+" + subPath)));

[AnuradhaSK]

Suggested change

	return Pattern.compile("^/t/[^/]+/o/[a-f0-9\\-]+?").matcher(requestURI).find();
	return Pattern.compile("^/t/[^/]+/o/[a-z0-9\\-]+?").matcher(requestURI).find();