Workers now depsolve in parallel to image builds, so we can
again move depsolivng to the workers. This will help us deal
with increases in traffic as we currently only have one
depsolve handler per pod. It would also avoid any issues with
composer running out of disk space due to dnf metadata caches.
This reverts commit c65b1e9b26.
V2 is compliant with api.openshift.com design guidelines.
Errors are predefined, have codes, and are queryable.
All requests have an operationId set: a unique identifier which is
sortable by time. This is added to the response in case of an error.
All returned objects have the href, id, and kind field set.
