Merge branch '89-create-endpoint-to-list-all-the-answers-that-the-student-submitted-for-particular-task' into 'develop'

New endpoint to get all trainees submissions.

See merge request !91

Resolve "Add attribute representing MITRE techniques into training phase"

See merge request !90

Resolve "Add new field expected commands to the training phase"

See merge request !89

Resolve "Deserialize fields in the swagger documentation in snake case"

See merge request !88

Resolve "Make the archived training definition same as the exported one"

See merge request !87

Resolve "Allow to edit end-time of the ongoing training instance"

Closes #84

See merge request !83

Prefill tasks title by phase title.

Closes #83

See merge request !82

Added an attribute email to the UserRefDTO class.

Closes #82

See merge request !81

Fix delete finished training instance with assigned training runs.

Closes #81

See merge request !80

Added new attribute sandbox definition ID into training instance.

Closes #80

See merge request !79

Merge branch '75-adjust-collection-of-visualization-data-due-to-the-new-phase-type-and-usage-of-local-sandboxes' into 'master'

Resolve "Adjust collection of visualization data due to the new phase type and usage of local sandboxes"

Closes #75

See merge request !78

Resolve "Adjust collection of visualization data due to the new phase type and usage of local sandboxes"

Merge branch '76-fix-process-of-import-training-definition-after-adding-the-access-level' into 'master'

Fix import training definition. Added new test class that tests this functionality.

Closes #76

See merge request !77

Added attribute local environment to training instance entity.

Closes #74

See merge request !76

Added new access phase with all business logic.

Closes #73

See merge request !75

Changed default property file for docker usage...

Closes #72

See merge request !74