Merge branch 'SDC-436-validation' into 'master'

atdb/taskdatabase/models.py

atdb/taskdatabase/services/algorithms.py

atdb/taskdatabase/tables.py

...tabase/templates/taskdatabase/failures/failures_page.html

...abase/templates/taskdatabase/failures/tasks_failures.html

atdb/taskdatabase/templates/taskdatabase/index.html

...atabase/templates/taskdatabase/quality/tasks_quality.html

atdb/taskdatabase/templates/taskdatabase/tasks_headers.html

...e/templates/taskdatabase/validation/tasks_validation.html

...tes/taskdatabase/validation/tasks_validation_headers.html

...se/templates/taskdatabase/validation/validation_page.html

atdb/taskdatabase/urls.py

atdb/taskdatabase/views.py