Upgrade qemu to >=1.4

Registered by Andrew Lazarev

qemu 1.2.0 was released 2 years ago
recent versions have tons of performance improvements
>=1.4 (released a year ago) is required for appropriate hadoop performance (sahara)

Needed solution:
Update QEMU to version 2.0 and libvirt to version 1.2.5.

Feature Lead: assignee of this blueprint
Mandatory Design Reviewers: Vladimir Kuklin
Developers: Vitaly Parakhin, Alexander Podrepniy
QA: Ievgeniya Dukhopelnikova

Blueprint information

Status:
Complete
Approver:
None
Priority:
High
Drafter:
Andrew Lazarev
Direction:
Approved
Assignee:
Alexander Podrepniy
Definition:
Approved
Series goal:
Accepted for 5.1.x
Implementation:
Implemented
Milestone target:
milestone icon 5.1
Started by
Roman Vyalov
Completed by
Vladimir Kuklin

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Gerrit topic: https://review.openstack.org/#q,topic:upgrade-qemu,n,z

Addressed by: https://review.openstack.org/105863
    Remove obsolete qemu workaround

(?)

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