[Bug] Tasks not displayed when importing alert into case with case template

[lo-chr]

[Bug] Tasks not imported from Case-Template

Request Type

Bug

Work Environment

Question	Answer
OS version (server)	Ubuntu 20.04
OS version (client)	MacOS 10.15.4
TheHive version / git hash	4.0 RC1
Package Type	DEB
Browser type & version	Safari 15609.1.20.111.8

Problem Description

After importing an case from an alert, the predefined tasks are not displayed in the case view.

Steps to Reproduce

1. Create case template with tasks
2. Create alert (i.E. via API)
3. Import alert as case
4. View Alert, switch to "tasks"
5. See nothing :(

[lo-chr]

This might be a special form of this one: #1311