Support for Windows in Virtualbox scripts

Added support for Cygwin.
Increased default disk and memory sizes for compatibility with Heat.
Added checks for non-installed Cygwin components.
Default NIC type changed to faster AMD PCnet FAST III.
Added check on network settings application.
Added trick to increase network configuration stability under Windows.
Changed hard-coded interface addition part to automatic loop.
Removed extra whitespaces.
Changed Fuel Web to Mirantis OpenStack
Rebased to latest commit.

Closes-Bug: #1252314
Change-Id: I466ebec87506eade5164de7d27d73f10dbbea0d9
Merge "Support for Windows in Virtualbox scripts"