'Writes a file on the specified instance.
The first parameter is an instance of nova.compute.service.Instance,
and so the instance is being specified as instance.name. The second
parameter is the base64-encoded path to which the file is to be
written on the instance; the third is the contents of the file, also
base64-encoded.
NOTE(russellb) This method is deprecated and will be removed once it
can be removed from nova.compute.manager.'

def inject_file(self, instance, b64_path, b64_contents):

    raise NotImplementedError()
