Collections parameter needed for users with assigned collections

[iansk]

If a user is configured with assigned collections, they are required to pass the collections= parameter in order to get results. Otherwise, they receive the following error:

"err":"collection was not specified"

This parameter is not specified on any call, but looks to be supported for any of the image scan endpoints.

curl -k -u -H 'Content-Type: application/json' -X GET "https://:8083/api/v1/images?collections="

(Reported by @brianbuquoi on Oct 26, 2020)