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/tempest/api/network/common.py b/tempest/api/network/common.py
index 22eb1d3..c3fb821 100644
--- a/tempest/api/network/common.py
+++ b/tempest/api/network/common.py
@@ -32,7 +32,7 @@
 class DeletableResource(AttributeDict):
 
     """
-    Support deletion of quantum resources (networks, subnets) via a
+    Support deletion of neutron resources (networks, subnets) via a
     delete() method, as is supported by keystone and nova resources.
     """