inject_user_key routine fixes

Change-Id: I33da18782131a14c4e195995272295db7718bb92
Signed-off-by: calvinosanch <guillermo.calvinosanchez@altran.com>
diff --git a/osm_ro/openmano_schemas.py b/osm_ro/openmano_schemas.py
index b8d197a..8fd2889 100644
--- a/osm_ro/openmano_schemas.py
+++ b/osm_ro/openmano_schemas.py
@@ -1156,7 +1156,7 @@
         "reboot": {
             "type": ["object", "null"],
         },
-        "add_public_key": description_schema,
+        "add_public_key": {"type" : "string"},
         "user": nameshort_schema,
         "console": {"type": ["string", "null"], "enum": ["novnc", "xvpvnc", "rdp-html5", "spice-html5", None]},
         "vdu-scaling": {