Remove ucloud_common and put its files under ucloud.common subpackage.

Remove individual config.py used by every component and put them into single config.py ucloud/config.py
Use /etc/ucloud/ucloud.conf for Environment Variables
Refactoring and a lot of it
Make ucloud repo a package and different components of ucloud a subpackage for avoiding code duplication.
Improved logging.

host/qmp/qmp.py

@@ -8,10 +8,10 @@
 # This work is licensed under the terms of the GNU GPL, version 2.  See
 # the COPYING file in the top-level directory.
 
-import json
 import errno
-import socket
+import json
 import logging
+import socket
 
 
 class QMPError(Exception):
@@ -31,7 +31,6 @@ class QMPTimeoutError(QMPError):
 
 
 class QEMUMonitorProtocol(object):
-
     #: Logger object for debugging messages
     logger = logging.getLogger('QMP')
     #: Socket's error class