Description of problem:
A stack creation in Openstack dashboard fail with the error "The Volume ({ get_resource: Volume_test }) could not be found." despite of the volume "Volume_test" existence.

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. In Horizon create an example project with a server, a volume and a volume attachment to be launched together as a stack.
2. Draw the lines to connect server and volume to the attachment in the canvas.
3. The "get" attributes in the attachment is auto filled.
4. Try to create a stack.

Actual results:
Pop-up error message with "The Volume ({ get_resource: Volume_test }) could not be found."


Expected results:
Stack created successfully.

Additional info:
Error in logs:
2024-01-01 01:01:01,507 24 WARNING horizon.exceptions Recoverable error: ERROR: Property error: : resources.VolumeAttachment_test.properties.volume_id: : Error validating value '{ get_resource: Volume_tes }': The Volume ({ get_resource: Volume_test }) could not be found.

Workaround:
Manually change the YAML file of the stack as below because what cause the issue is the double quotes automatically inserted in the parameter instance_uuid and volume_id.
From:
    properties: 
      instance_uuid: "{ get_resource: Server_test }"
      volume_id: "{ get_resource: Volume_tes }"
To:
    properties: 
      instance_uuid: { get_resource: Server_test }
      volume_id: { get_resource: Volume_test }