Ensure default route will exist after netconfig stage is done

Fixes: #PRD-1716

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>
Add caching mode; cache=none breaks qemu-1.2 and 0.12 in RH derivatives
proper place
Enable gzip in Nginx for Nailgun 'text/plain' and 'application/json' content types
Move openstack cirros image upload to Astute
Quantum fix: losted integration bridge
Put default route after interface creation

ISSUE: Centos affected only.
For system wide configured gateway (/etc/sysconfig/network), there is no ensure
it would has been applied as a default route. It will be applied only after node's
reboot or network restart.

SOLUTION:
We should avoid using "heavy" operations like 'service network restart', thus,
we should create default route by manually adding it into routing table while
its config stage (adding GATEWAY to /etc/sysconfig/network) is being executed as well.

We should also ensure right apply order as well (L3_if_downup <||> -> Defaultroute[$def_gateway])

Fixes: #PRD-1716

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>
Add missed requirement for subscription

Fixes: #PRD-2080

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>
Quantum fix: Wrong calculate local ip address for GRE
remove debug print
RHOS needs qemu-kvm-rhev instead of qemu-kvm
Merge pull request #663 from warpc/upload_image

Move openstack cirros image upload to Astute
Merge pull request #658 from Mirantis/fix-nova-cache-policy

Add caching mode; cache=none breaks qemu-1.2 and 0.12 in RH derivatives
Merge pull request #675 from mattymo/fix-qemu-kvm-rhos

Syntax check made locally due to Jenkins fail.
Fix horizon log permissions bug
Fix typo in savanna mysql url
Merge pull request #661 from e0ne/nginx-gzip

Enable gzip in Nginx for Nailgun
Merge pull request #674 from bogdando/fix_prd2080

Add missed requirement for subscription
Merge pull request #672 from xenolog/Q32-fix-02

Quantum fix: losted integration bridge name
Merge pull request #676 from dmitryilyin/msh_fixes

Msh fixes