This has always incorrectly been a race, it looks like, but for
some reason we were winning it before but we're losing it now.
The client seems to be pinging while the server's still typing
stuff into grub. So let's have the server set a mutex, and the
client wait for it.
Signed-off-by: Adam Williamson <awilliam@redhat.com>
The VNC installation method has been replaced with a similar method
based on RDP. This PR uses the old mechanism and alters it for the
RDP method.
The test suite consists of two parts, a server and a client part.
The server is the real test on which Fedora Custom installation
is performed from the client via RDP.
The client is spinned off the pre-installed desktop image.
Fixes#345
