* Support full GitHub app authentication
Refactor GithubIntegration class and add test case for app authentication
Add permissions and repository properties in InstallationAuthorization
Set JWT_EXPIRY=60 by default in GithubIntegration constructor
* Modify existing testcases for GithubIntegration as per the framework and add missing tests
* Provide installation ID for creating the access token instead of getting the first installation
* Add optional permissions support for installation access token
* Add lock around app authentication
* Keep compatibility for importing GithubIntegration from MainClass
* Group app authentication parameters in a class
Co-authored-by: Malik Ammar Akbar <malikammar.akbar@pfizer.com>
Co-authored-by: Enrico Minack <github@enrico.minack.dev>
Trim21