Add method to attach several interfaces for one network

Added interfaces_create method that creates the given
count of interfaces for the given network

Change-Id: I01b68d38449dc7bec6868d03159b1c9a803e67a5
Closes-Bug: #1301834
Update copyright year properly

In https://review.openstack.org/#/c/68883/ copyright year was changed, but
 not in correct format. This updates the copyright to a year range on the
 files that where modified in that commit.

Change-Id: Ie0f76191cfed742eeeee0ddc4466022ad4cf637f
Fix sync function so that it doesn't remove nodes/envs wrong

'dos.py sync' function was using a bad call to libvirt which only
returns stopped domains. This causes envs with nodes on to be pruned.
If all nodes are on, then the whole env is removed from db

It further removes all nodes that are not in the db, this is not OK
 because it will undefine nodes that might have never been managed
 by devops. This is disabled untill a safer option is designed.

Change-Id: Ic257d6bd98d0a9b38df4ddb7aab04517762302a4
Closes-bug: #1316856
Merge "Fix sync function so that it doesn't remove nodes/envs wrong"
LICENCE added

Change-Id: I97d27a1a2c04164b79c0141f87a34152883487e7
Partial-Bug: #1326514
Default timezone for clear logging

Change-Id: I9844af909d9c95e9da4b0b7c94f3cdc0dd799e8f
Support of 'bridge' network implemented for libvirt driver

Implementation of 'bridge' network type that allows to connect
VM to existing host bridge interface

Change-Id: I69ebbde21ce2c9e4063bc402e7ab23a359f173bf