Add request_id in the solution status list

/conf*.json

/test.py

/problems/*

/problems-gen/*

!/problems/.gitkeep

/solutions/*

/solutions-gen/*

!/solutions/.gitkeep

                {% set tr_class = tr_class + ' submit-solution' if k == problem.best_solution else '' %}

                {% set tr_class = tr_class + ' valid-solution' if v.is_valid_solution() else '' %}

                <tr class="solution-detail-row {{tr_class}}" data-solution-id="{{k}}" data-problem="{{problem.name}}">

                    <td>{{v.timestamp_str}}</td>

                    <td>{{v.timestamp_str}} ({{v.request_id}})</td>

                    <td>{{v.worker}}</td>

                    <td>

                        {% if v.is_valid_solution() %}