update Quantum to Neutron

Update to use the neutronclient library and replaces Quantum references within
the repository.

implements bug: 1197208

Change-Id: Ib3d52e3d9671fe4b30c4bcf76b5e7c2ee9de4664
diff --git a/requirements.txt b/requirements.txt
index 606d7ae..b3c706b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@
 python-glanceclient>=0.5.0
 python-keystoneclient>=0.2.0
 python-novaclient>=2.10.0
-python-quantumclient>=2.1
+python-neutronclient>=2.2.3,<3.0.0
 python-cinderclient>=1.0.4,<2
 testresources
 keyring