Merge branch 'SDC-1423-use-aggregation-strategy' into 'master'

atdb/atdb/static/taskdatabase/style.css

atdb/requirements/base.txt

atdb/run_coverage.bat

atdb/taskdatabase/migrations/0049_task_is_aggregated.py

atdb/taskdatabase/models.py

atdb/taskdatabase/serializers.py

atdb/taskdatabase/services/activities_handler.py

atdb/taskdatabase/services/algorithms.py

atdb/taskdatabase/services/common.py

atdb/taskdatabase/static/taskdatabase/style.css

atdb/taskdatabase/templates/taskdatabase/index.html

atdb/taskdatabase/templates/taskdatabase/tasks.html

...taskdatabase/templates/taskdatabase/validation/tasks.html

atdb/taskdatabase/tests/test_models_processed_summary.py

atdb/taskdatabase/tests/test_summary_tasks.py

atdb/taskdatabase/tests/test_update_activity.py

atdb/taskdatabase/tests/test_views_postprocessing_page.py

atdb/taskdatabase/views.py