Added test for untagged networks feature. Added methods to work with network interfaces to nailgun_client module
Removed test_untagged_network.py module and moved test that it contained to test_node.py module
Fixed pep8 issues
Update config.mk file with new OSTF sha commit
Merge pull request #1480 from tleontovich/update_config_mk_file

Update config.mk file with new OSTF sha commit
Add NAT to admin node
Functions for updating redhat release
Test for uploading RedHat release. Nosetest attributes for releases
Fix PEP8
dos.py revert CLI documentation fix
[disks] Add file system for logical volumes and boot record

| partition | file system |
|-----------+-------------|
| root      | ext4        |
| swap      | swap        |
| nova      | xfs         |
| glance    | xfs         |
| boot raid | ext2        |
[tests] read_fixture method logs error message
[disks] add ability to define partition in release fixtures
[disks] Fix updating partitions, and size calculation for convertor
[disks] add tests for ceph
Disk label support for plain partitions in volume manager
Added Ceph OSD role
Fix flake8 issues
Unit test fixes for Ceph disk tests
More flake8 fixes