Removed dependency to prctl

from cloudcontrol.server import __version__

import prctl

def listed(func):

    func.__listed__ = True

        @functools.wraps(func)

        def wrapper(*args, **kwargs):

            call_id = base64.b64encode(os.urandom(6))

            if getattr(func, '__threaded__', True):

                prctl.set_name('H: %s' % call_id)

            started = time.time()

            returned = func(*args, **kwargs)

            duration = time.time() - started