Add python-quantumclient to pip-requires

Change-Id: If30572e695dd7a34553339ee3997aaf930a06f0c
diff --git a/tools/pip-requires b/tools/pip-requires
index a0128e8..061eff6 100644
--- a/tools/pip-requires
+++ b/tools/pip-requires
@@ -9,3 +9,4 @@
 python-glanceclient>=0.5.0
 python-keystoneclient>=0.2.0
 python-novaclient>=2.10.0
+python-quantumclient>=2.1