Fix bug 772. vim_thread tasks key params

Change-Id: I533859eb38a02ff3c084b6d53a735660f4ec46b1
Signed-off-by: tierno <alfonso.tiernosepulveda@telefonica.com>
diff --git a/osm_ro/http_tools/request_processing.py b/osm_ro/http_tools/request_processing.py
index 0b8a6ca..f2dabc8 100644
--- a/osm_ro/http_tools/request_processing.py
+++ b/osm_ro/http_tools/request_processing.py
@@ -150,11 +150,11 @@
         return client_data, used_schema
     except (TypeError, ValueError, yaml.YAMLError) as exc:
         error_text += str(exc)
-        logger.error(error_text, exc_info=True)
+        logger.error(error_text)
         bottle.abort(httperrors.Bad_Request, error_text)
     except js_e.ValidationError as exc:
         logger.error(
-            "validate_in error, jsonschema exception", exc_info=True)
+            "validate_in error, jsonschema exception")
         error_pos = ""
         if len(exc.path)>0: error_pos=" at " + ":".join(map(json.dumps, exc.path))
         bottle.abort(httperrors.Bad_Request, error_text + exc.message + error_pos)
diff --git a/osm_ro/vim_thread.py b/osm_ro/vim_thread.py
index 7b197da..ffe721c 100644
--- a/osm_ro/vim_thread.py
+++ b/osm_ro/vim_thread.py
@@ -258,6 +258,7 @@
                     # task of creation must be the first in the list of related_task
                     assert(related_tasks[0]["action"] in ("CREATE", "FIND"))
 
+                    task["params"] = None
                     if task["extra"]:
                         extra = yaml.load(task["extra"])
                     else: