Version number is not reported properly by the Hyper-V driver

[Alessandro Pilotti]

Nova expects the hypervisor version to be reported as an int.

Although undocumented, the int is converted back to a version number x.y.z by splitting the int in groups of 3 decimal digits:
See: https://github.com/openstack/nova/blob/master/nova/utils.py#L1016

The hyper-v driver reports the OS version by removing the "." in the version, so 6.3.9600 (Hyper-V 2012 R2) becomes 639600, which once translated becomes 639.600, which is incorrect.

This is needed by image scheduler filters that use "requests_hypervisor_version=x.y.z" to request a minimum hypervisor version.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/146274

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/146274
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=673221b2384c9e792c2d9be5192bb341a01857e8
Submitter: Jenkins
Branch: master

commit 673221b2384c9e792c2d9be5192bb341a01857e8
Author: Claudiu Belu <email address hidden>
Date: Sat Jan 10 14:47:39 2015 +0200

    Hyper-V: Fixes wrong hypervisor_version

    The hypervisor_version will be stored in the database as
    an Integer and it will be used by the scheduler, if required
    by the image property 'hypervisor_version_requires'.

    The hypervisor_version will then be converted back to a version
    by spliting the int in groups of 3 digits.
    E.g.: hypervisor_version 6003 is converted to '6.3'.

    Currently, the reported hypervisor_version by the Hyper-V driver
    is wrong. For example, for Windows Hyper-V / Server 2012 R2
    or Windows 8.1, the hypervisor_version reported is '639600',
    which will later be converted to 639.600 by the scheduler.

    Closes-Bug: #1409258

    Change-Id: Id991fefed08d1da2a68db4c27de72ac2252b1781