sgdisk: command not found in docker-cobbler.log and docker-nailgun.log

[Sergey Kulanov]

1. Install ISO #1 - kilo-8.0
2. After successful test passed https://ci.fuel-infra.org/job/master.fuel-library.pkgs.ubuntu.neutron_vlan_ha/864/ we have error messages in logs:
`rgrep sgdisk fuel-snapshot-2015-09-10_12-14-22/*`

fuel-snapshot-2015-09-10_12-14-22/10.109.0.2/var/log/docker-nailgun.log:sh: sgdisk: command not found
fuel-snapshot-2015-09-10_12-14-22/10.109.0.2/var/log/docker-nailgun.log:sh: sgdisk: command not found
fuel-snapshot-2015-09-10_12-14-22/10.109.0.2/var/log/docker-cobbler.log:sh: sgdisk: command not found
fuel-snapshot-2015-09-10_12-14-22/10.109.0.2/var/log/docker-cobbler.log:sh: sgdisk: command not found

Reason:
 This happens because we don't have gdisk package installed on node for gathering facts:

https://github.com/stackforge/fuel-library/blob/master/deployment/puppet/ceph/lib/facter/ceph_osd.rb#L20

Solution:
Check if we have packages installed

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/222167

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/222167
Committed: https://git.openstack.org/cgit/stackforge/fuel-library/commit/?id=b96caa25630479d77b4316c7f006c049b2ebf4cb
Submitter: Jenkins
Branch: master

commit b96caa25630479d77b4316c7f006c049b2ebf4cb
Author: Sergey Kulanov <email address hidden>
Date: Thu Sep 10 15:31:35 2015 +0300

    Handle sgdisk utility missing for ceph facts

    We can have environment without installed gdisk packages
    that is why we need to correctly handle facts, gathering
    with sgdisk utility

    Change-Id: I00882c9fc885afcb9dce5319f4a6a29aa89fd125
    Closes-bug: #1494301

[Nastya Urlapova (aurlapova)]

Worked on https://ci.fuel-infra.org/job/master.fuel-library.pkgs.ubuntu.neutron_vlan_ha/5976/consoleFull