Support multiple sonarqube servers

Summary

Currently, the new sonarqube server forces authentication, while we plan to switch it off, to support private projects we anyway need to be able to pass tokens.

We need to configure tokens per server, so I introduced the possibility to set tokens in this way:

SONAR_API_TOKEN_1=<url 1>,<token 1>
SONAR_API_TOKEN_2=<url 2>,<token 2>