Move to the python-saharaclient

Now we can call sahara cli command instead savanna old one.

Change-Id: I063c02eb2dac300140eed4f1ccff7eb58621bcaa
diff --git a/requirements.txt b/requirements.txt
index 434e12e..a18b092 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@
 python-neutronclient>=2.3.4,<3
 python-cinderclient>=1.0.6
 python-heatclient>=0.2.3
-python-savannaclient>=0.5.0
+python-saharaclient>=0.6.0
 python-swiftclient>=1.6
 testresources>=0.2.4
 keyring>=1.6.1,<2.0,>=2.1