Change endpoint responses where there are marshalling, unmarshalling

or param errors to raise invalid data exception. That will cause
those responses to be handled in by errors.py, which will log
the errors.

Set most of schemas to strict mode so that marshmallow will raise
exception rather than checking for errors in return tuple from load.

Added handler to errors.py for marshmallow validation errors.

app/events/rest.py

@@ -5,6 +5,7 @@ from flask import (
 )
 
 from app.errors import register_errors
+
 from app.schemas import event_schema
 from app.dao.events_dao import dao_create_event
 
@@ -15,8 +16,6 @@ register_errors(events)
 @events.route('', methods=['POST'])
 def create_event():
     data = request.get_json()
-    event, errors = event_schema.load(data)
-    if errors:
-        return jsonify(result="error", message=errors), 400
+    event = event_schema.load(data).data
     dao_create_event(event)
     return jsonify(data=event_schema.dump(event).data), 201