More informative message on password expiry

Make it more clear what is happening when password
had expired preventing login...

Change-Id: I63a947cca6749ba12ab2d03e279016b389dc1f30

pyghmi/ipmi/oem/lenovo/nextscale.py

@@ -278,6 +278,10 @@ class SMMClient(object):
         for data in authdata.findall('authResult'):
             if int(data.text) != 0:
                 raise Exception("Firmware update already in progress")
+        for data in authdata.findall('forwardUrl'):
+            if 'renew' in data.text:
+                raise Exception("Account password has expired on remote "
+                                "device")
         self.st1 = None
         self.st2 = None
         for data in authdata.findall('st1'):