[FIX] web: disable debounce functionality

With the new views, we introduced a system where some fields could
notify immediately the rest of the system that they have been changed.
It is really cool, it allows real time edition (with onchanges).

However, this was a little too much.  In some cases (an onchange that
returns a warning), it was counterproductive.  So, we decided to simply
remove the feature.  This commit only make sure that it does not happen,
and we will do a deeper pass later to make sure that no useless code is
left behind.

Note that this means that we can reintroduce the functionality really
easily later, eventually protected by an attribute.

addons/web/static/src/js/fields/basic_fields.js

@@ -65,7 +65,7 @@ var DebouncedField = AbstractField.extend({
      * it could be a good idea to debounce the changes. In that case, this is
      * the suggested value.
      */
-    DEBOUNCE: 1000,
+    DEBOUNCE: 1000000000,
 
     /**
      * Override init to debounce the field "_doAction" method (by creating a new