Use correct namespace for exception class

Change-Id: I198259f79f8359b7030bc32ffbea681f5bd29a80
diff --git a/TestON/drivers/common/cli/onosdriver.py b/TestON/drivers/common/cli/onosdriver.py
index 1abf258..f3de98f 100755
--- a/TestON/drivers/common/cli/onosdriver.py
+++ b/TestON/drivers/common/cli/onosdriver.py
@@ -2288,7 +2288,7 @@
             # Either no non-localhost IPs, or more than 1
             main.log.warn( "getIpAddr failed to find a public IP address" )
             return LOCALHOST
-        except CalledProcessError:
+        except subprocess.CalledProcessError:
             main.log.exception( "Error executing ifconfig" )
         except IndexError:
             main.log.exception( "Error getting IP Address" )