Fixed typo in simple charm

Change-Id: I9b5d9a41e1dd14ab387338c94afb0d740f2620ce
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>

juju-charms/layers/simple/metadata.yaml

 name: simple
-summary: A simple VNF proxy charm 
+summary: A simple VNF proxy charm
 maintainer: Adam Israel <adam.israel@canonical.com>
 subordinate: false
 series: ['xenial']

juju-charms/layers/simple/reactive/simple.py

@@ -39,6 +39,6 @@ def touch():
     except:
         action_fail('command failed:' + err)
     else:
-        action_set({'outout': result})
+        action_set({'output': result})
     finally:
         clear_flag('actions.touch')