External reference URL are not properly validated during creation

[JeremyCloarec]

Description

The validation doesn't recognize some valid URLs.
URLs in the form of http://localhost:4000/storage/get/* are not accepted for exemple, as well as ftp addresses.

Environment

1. OS (where OpenCTI server runs): { e.g. Mac OS 10, Windows 10, Ubuntu 16.4, etc. }
2. OpenCTI version: { e.g. OpenCTI 1.0.2 }
3. OpenCTI client: { e.g. frontend or python }
4. Other environment details:

Reproducible Steps

Steps to create the smallest reproducible scenario:

1. Go to External references
2. Click on create an external ref
3. Set URL to http://localhost:4000/storage/get/blabla.txt

Expected Output

URL is validated

Actual Output

We get a message saying that 'The value must be an URL'

Additional information

Screenshots (optional)

[Archidoit]

Other scenario :

Create an entity with a file. The external ref is well created.
Click on Update the external ref :

Change the source name. An error occurs for the URL field :

But the external ref is well updated if we leave the edition form :