Do not limit the max versions in the requirements

* The tempest should be compatible with latest openstack componets

Change-Id: I1d981a18757cae4e8bc3599e7f8196eabd5c0a2a
diff --git a/tools/pip-requires b/tools/pip-requires
index 6542a3c..a0128e8 100644
--- a/tools/pip-requires
+++ b/tools/pip-requires
@@ -6,6 +6,6 @@
 boto>=2.2.1
 paramiko
 netaddr
-python-glanceclient>=0.5.0,<2
+python-glanceclient>=0.5.0
 python-keystoneclient>=0.2.0
-python-novaclient>=2.10.0,<3
+python-novaclient>=2.10.0