fix greylog log level
Merge pull request #175 from lensky84/fix_greylog_level

fix greylog log level
fix check ticket have discount
Merge pull request #176 from lensky84/fix_multi_tickets_promocode

fix check ticket have discount
Merge pull request #174 from lensky84/13371_fix_qrcode

fix url check QR-code for user
Fix test and travis config