Description of problem:

https://github.com/openstack/glance/commit/1b144f4c12fd6da58d7c48348bf7bab5873388e9#diff-f02c20aafcce326b4d31c938376f6c2aR78 -> head -> desk

The dest_path is not formated correctly, which ends up in converting the image to a path that is completely ignored by other tasks.
Version-Release number of selected component (if applicable):


How reproducible:

100%

Steps to Reproduce:
1. Run openstack-glance and enable image conversion by setting the required configs in glance-api.conf

2. Import an image (replace HTTP_IMAGE_URL)

glance --os-image-api-version 2  --os-image-url task-create --type import --input '{"import_from_format": "qcow2", "import_from": "$HTTP_IMAGE_URL, "image_properties": {"disk_format": "qcow2", "container_format": "bare"}}'

3. See that the converted image is not used and the reported information is wrong. (glance image-show)