Remove Ubuntu Point release from fixtures

[Sergii Golovatiuk]

Fuel uses upstream packages starting from 6.1. In UI and CLI Fuel shows

[root@nailgun ~]# fuel release
id | name | state | operating_system | version
---|------------------------|-------------|------------------|-------------
2 | Kilo on Ubuntu 14.04.1 | available | Ubuntu | 2015.1.0-7.0
1 | Kilo on CentOS 6.5 | unavailable | CentOS | 2015.1.0-7.0

UI screenshot is attached.

However, at the same time if we check the actual version it's

root@node-4:~# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04.3 LTS
Release: 14.04
Codename: trusty

which is different from UI/CLI. To fix this for sure we need to remove point release version from fixtures.