[BP 7.0.5] User database upgrade might render cluster unusable under the constant flow of auth attempts

Happened during the online upgrade from 6.6.3 to 7.1.1.

1. user database was upgraded to 7.1

2. at this point the cluster compat version is still 6.6.3

3. any auth request for the user that is configured with roles that were upgraded faces the following problem: the upgraded roles are compiled with the old role definitions, which causes crash in rbac

4. few subsequent crashes cause max_restart_intensity and crash of users_sup, which causes node to be down

5. which causes the upgrade to be infinitely unfinished and crashes happening over and over again

The proposed solution:

Catch the crashes in compile_roles and in case of unfinished upgrade try the compilation again but with latest roles definitions.