Make jqueue unittests more generic

This patch removes/abstracts some hardcoded values in the jqueue
unittests. Currently we have a per-resource type name field, but the
name field values are hardcoded at the call sites, instead of being
abstracted into separate variables.

This will become a problem later, so let's just introduce some new
vars holding these; modifying the tests later will be therefore
easier.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>