Propuesta puche

Three small changes:
- In max-update-post-inst subtitute repo instead of whole replace to preserve repo name or ip in case it was changed
- In home-alumno-gui deleted scaping spaces as it was not needed
- In max-ldap deleted an early 'return True' and add splitlines() to process result message line by line (and not one character at a time)

¿Qué carajo hago escribiendo esto en inglés si ahora caigo que sólo lo vamos a leer nosotros? :-(