Description of problem:
Unable to save bookmarks for task search queries in Satellite GUI.

Version-Release number of selected component (if applicable):
Red Hat Satellite 6.7 - Beta

How reproducible:
Always

Steps to Reproduce:
1. Navigate to the Monitor >> Tasks in the Satellite GUI.
2. Enter any search query and try to save the search query as a bookmark.
3. When we click on Save, nothing happens.

Actual results: 

1. Nothing happens. No bookmark saved.


2. Observed following error traceback as below:

---
 2020-02-12T11:09:47 [I|app|a37719a7] Started POST "/api/bookmarks" for 10.76.0.14 at 2020-02-12 11:09:47 -0500
2020-02-12T11:09:47 [I|app|a37719a7] Processing by Api::V2::BookmarksController#create as JSON
2020-02-12T11:09:47 [I|app|a37719a7]   Parameters: {"name"=>"test", "query"=>"state = scheduled ", "public"=>true, "apiv"=>"v2", "bookmark"=>{"name"=>"test", "query"=>"state = scheduled ", "controller"=>"api/v2/bookmarks", "public"=>true}}
2020-02-12T11:09:47 [E|app|a37719a7] Unprocessable entity Bookmark (id: new):
  Controller tasks is not a valid controller

2020-02-12T11:09:47 [I|app|a37719a7]   Rendering api/v2/errors/unprocessable_entity.json.rabl within api/v2/layouts/error_layout
2020-02-12T11:09:47 [I|app|a37719a7]   Rendered api/v2/errors/unprocessable_entity.json.rabl within api/v2/layouts/error_layout (4.3ms)
2020-02-12T11:09:47 [I|app|a37719a7] Completed 422 Unprocessable Entity in 71ms (Views: 23.6ms | ActiveRecord: 14.5ms)
2020-02-12T11:09:52 [I|app|73ff56db] Started POST "/api/bookmarks" for 10.76.0.14 at 2020-02-12 11:09:52 -0500
2020-02-12T11:09:52 [I|app|73ff56db] Processing by Api::V2::BookmarksController#create as JSON
2020-02-12T11:09:52 [I|app|73ff56db]   Parameters: {"name"=>"test", "query"=>"state = scheduled ", "public"=>false, "apiv"=>"v2", "bookmark"=>{"name"=>"test", "query"=>"state = scheduled ", "controller"=>"api/v2/bookmarks", "public"=>false}}
2020-02-12T11:09:52 [E|app|73ff56db] Unprocessable entity Bookmark (id: new):
  Controller tasks is not a valid controller
---

Expected results:

We should be able to save the search query as a bookmark.