Add state reporting to the metadata agent

Need to add state reporting in order metadata agent
to appear in Neutron's agent list output

Closes-Bug: #1250369
Change-Id: I3a001e065004685d9702e817336e5d4923597791

Conflicts:
	quantum/agent/metadata/agent.py
	quantum/common/constants.py

Hyunsun: Added some fix to use this patch with Grizzly
Merge pull request #26 from hyunsun/UCLOUDNG-1017

Add state reporting to the metadata agent
rabbit HA patch for rpc
Merge pull request #28 from kt-cloudware/kombu

rabbit HA patch for rpc
Change RDP port from 3389 to 9000 for IPC
Merge pull request #29 from hyunsun/UCLOUDNG-1070

UCLOUDNG-1070 Change RDP port from 3389 to 9000