Allowed for multiple service handling and fixed in_progress update

[svarona]

Changes:

• Added MAG tempalte
• Removed MAG from other templates
• Allowed to handle more than one service at a time (Allow for multiple templates to be included in a single service #217)
• Added a test to avoid updating service's state to in_progress multiple times Add a check stage before setting "in progress" services when new-service is executed #285

PR checklist

• This comment contains a description of changes (with reason).
• Make sure your code lints (black and flake8).
• If a new tamplate was added make sure:
  • Template's schema is added in templates/services.json.
  • Template's pipeline's documentation in assets/reports/md/template.md is added.
  • Results Documentation in assets/reports/results/template.md is updated.
• CHANGELOG.md is updated.
• README.md is updated (including new tool citations and authors/contributors).
• If you know a new user was added to the SFTP, make sure you added it to templates/sftp_user.json

[Shettland]

LGTM!