Update README.md

Murray-LIANG · web-flow · commit 68ba6892e0bb · 2017-06-06T10:10:53.000+08:00
Update README about the Openstack version from Newton to Liberty
diff --git a/README.md b/README.md
@@ -30,7 +30,7 @@ Prerequisites
 | Software  | Version         |
 |-----------|-----------------|
 | Unity OE  | 4.1.X           |
-| OpenStack | Newton          |
+| OpenStack | Liberty         |
 | storops   | 0.4.11 or newer |
 
 Supported operations
