Mend machines status

Remove lower() function to prevent an exception of
'int' object has no attribute 'lower'.

Change-Id: Icbf00954f0ebdd2fe8647edcf0cea0be728a77d4
diff --git a/README.rst b/README.rst
index 315534d..d09b6fd 100644
--- a/README.rst
+++ b/README.rst
@@ -250,7 +250,7 @@
       - name: maas.wait_for_machine_status
       - kwargs:
             timeout: 1200 # in seconds
-            req_status: "deployed"
+            req_status: "Deployed"
             ignore_machines:
                - kvm01 # in case it's broken or whatever
       - require: