test-net40-v2: Delay .net 4.0 install to the end and run it stand alone

- Use sc to install openvpnserv2 if .NET 4.0 not found
- Download of net installer happens withing the installer, but .NET
  installation is left to run standalone.
- Only .NET 4.0 client profile installed which should be enough to run the
  service (?) Download slightly smaller and installs a bit faster (?)

Signed-off-by: Selva Nair <[email protected]>

Test Active Setup

Updated on Dec 03, 2016

v1.0-test: Check bitness in uninstaller and set the regview appropriately

Testing Active Setup