fix(jans-config-api): the admin-ui backend issues related to jetty 11 migration

[duttarnab]

Describe the bug
The admin-ui backend issues related to jetty 11 migration.

The following things are not working in admin-ui plugin

1. The license apis not working as licenseSpring sdk was not compatible with jakarta libs. We should use licenseSpring rest apis instead of sdk.
2. Need to do some code optimization in calling endpoints using resteasy client.
3. This also include changes in admin_ui configuration in database (jans-linux-setup).

[duttarnab]

Done