[Search] Fix reindexing

Flag domain objects as non-indexed on mutation to ensure
reindexing. Done in the context of nasa/openmctweb#141.

platform/search/src/services/GenericSearchProvider.js

@@ -171,6 +171,7 @@ define(
 
             // Re-index items when they are mutated
             mutationTopic.listen(function (domainObject) {
+                indexed[domainObject.getId()] = false;
                 indexItems([domainObject]);
             });
         }