[Bug] Unable to rename/update case template Name field

[gimmic]

Work Environment

Question	Answer
OS version (server)	Ubuntu 18.04 LTS
OS version (client)	Ubuntu 19.04
TheHive version / git hash	4 RC1
Package Type	DEB
Browser type & version	If applicable

Problem Description

After creating a case template, you cannot change the name of the template

Steps to Reproduce

1. create case template
2. Attempt to update template name
3. No error, 200 POST OK, but case template name is not updated

[nadouani]

In TheHive 4 we will add a field called displayName to case templates and name has been made read-only, which is not backward compatible.

Asking @To-om for a step back about the name attribute.