Artifacts: filtering by version ignores operators other than equality

[Alexander Tivelkov]

When the artifacts list is being filtered by the version (i.e. list all the artifacts having the given name and specific range of the version), the API ignores all the comparison operators, i.e. gt:, ge:, le: and lt: prefixed are accepted with the version value, but are ignored and an equality check is executed instead.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/214185

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/214185
Committed: https://git.openstack.org/cgit/openstack/glance/commit/?id=8a532a431f8c3695c0cd308cb753f526d0918f9f
Submitter: Jenkins
Branch: master

commit 8a532a431f8c3695c0cd308cb753f526d0918f9f
Author: Alexander Tivelkov <email address hidden>
Date: Tue Aug 18 16:23:20 2015 +0300

    Fixed version unequality artifact filtering

    When filtered by the value of version field artifact list was ignoring
    the filtering operators other then equality. I.e. it was possible to
    list only artifacts having the version equal to some specific value, but
    not the artifacts having the version less then or greater then some
    value.

    To implement the proper filtering a CompositeProperty comparator was
    added which filters the ORM entities in the lexigraphical order of
    version fields: first by version prefix, and then - if prefixes are
    equal - by version suffix.

    Closes-bug: #1480393
    FastTrack

    Change-Id: I67ae323e2b74745d794442d71b020becc494646b