Excessive backups performance suggestion.

[Zhenya Stanilovsky]

Igniters, i found that suggesting zero backup for performance improvements 
sounds like malicious and further problems suggestion. May be it`s time to 
remove it ?
 
Example:
[07:59:27] Performance suggestions for grid (fix if possible)
[07:59:27] To disable, set -DIGNITE_PERFORMANCE_SUGGESTIONS_DISABLED=true
[07:59:27] ^-- Decrease number of backups (set 'backups' to 0)