testing/perl-redis: upgrade to 2.000
- add ssl, username and password args to redis sentinel (Merwan Ouddane)
- Add support for username/password AUTH (Joel Chornik)
- Retry socket connect if errno is EINTR (Michael Schout)
- Better fix of redis version in test (Michal Josef Špaček)
- Fix of test for multiple arguments in info command (Michal Josef Špaček)