update roundcube to v1.0-rc
Merge remote-tracking branch 'nhanb/roundcube-1.0rc'
fix mysql attribute error (https://github.com/opscode-cookbooks/mysql/pull/93)
Merge pull request #176 from nhannguyen/mysql

fix mysql attribute error (https://github.com/opscode-cookbooks/mysql/pull/93)
add max_pred_locks_per_transaction for redhat