[fuel-mirror] debian repository related bugs

[Bulat Gaifullin]

There is some bugs in dependency resolving alrogirthm:
1. the deb package does not have 'obsoletes' section and 'replaces' does not mean obsoletes. [1]
     the debian driver interprets the 'replaces' as obsoletes. this should be fixed.
2. the VersionRange.has_intersection method does not work properly.
     the has_intersection returns false when one of edge is included to range and other is not included. for example:
    first range - '< 2.0.0' and second range '<= 2.0.0'. this ranges has intersection but method returns false. [2]

[1] https://www.debian.org/doc/debian-policy/ch-relationships.html#s-replaces
[2] https://github.com/openstack/fuel-mirror/blob/master/packetary/objects/package_relation.py#L61-L94

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/271718

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/271718
Committed: https://git.openstack.org/cgit/openstack/fuel-mirror/commit/?id=fdbcd571ab85d80fcca46ae3f94d4e3e55407220
Submitter: Jenkins
Branch: master

commit fdbcd571ab85d80fcca46ae3f94d4e3e55407220
Author: Bulat Gaifullin <email address hidden>
Date: Sat Jan 23 22:04:50 2016 +0300

    Backport deb driver fixes from packetary repository

    Fixed obsoletes detecting for deb package
    Fixed check intersection for range of versions

    Change-Id: Ia7f2e3e1b2c3f4adc26324b6267eea359c776ec0
    Closes-Bug: #1537391

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/8.0
Review: https://review.openstack.org/273087

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/273087
Committed: https://git.openstack.org/cgit/openstack/fuel-mirror/commit/?id=351d568fa3b3e4dd062054b91d766aa54d379867
Submitter: Jenkins
Branch: stable/8.0

commit 351d568fa3b3e4dd062054b91d766aa54d379867
Author: Bulat Gaifullin <email address hidden>
Date: Sat Jan 23 22:04:50 2016 +0300

    Backport deb driver fixes from packetary repository

    Fixed obsoletes detecting for deb package
    Fixed check intersection for range of versions

    Change-Id: Ia7f2e3e1b2c3f4adc26324b6267eea359c776ec0
    Closes-Bug: #1537391
    (cherry picked from commit fdbcd571ab85d80fcca46ae3f94d4e3e55407220)