BUG-14367 First login screen after installation always... SOLVED

- The text of username and password is hardcoded.
- was add criteria in file login_getStarted.php for obtain only username.
BUG-14367 First login screen after installation... IMPROVEMENT

- Change de text in admin.
BUG-14367 First login screen after installation... IMPROVEMENT

    - Delete link library.
Merge pull request #2409 from marcoAntonioNina/BUG-14367

BUG-14367 First login screen after installation... IMPROVEMENT