Add new document indexing permission. This permission allows user to view an index instance as opposed to the current permission which allows viewing an index definiton on the setup menu. Modernize the document index view tests.

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

mayan/apps/document_indexing/links.py

@@ -9,8 +9,9 @@ from .icons import (
 )
 from .permissions import (
     permission_document_indexing_create, permission_document_indexing_edit,
-    permission_document_indexing_delete, permission_document_indexing_rebuild,
-    permission_document_indexing_view
+    permission_document_indexing_delete,
+    permission_document_indexing_instance_view,
+    permission_document_indexing_rebuild,permission_document_indexing_view
 )
 
 
@@ -23,7 +24,10 @@ link_document_index_list = Link(
     text=_('Indexes'), view='indexing:document_index_list',
 )
 link_index_main_menu = Link(
-    icon_class=icon_index, text=_('Indexes'),
+    condition=get_cascade_condition(
+        app_label='document_indexing', model_name='Index',
+        object_permission=permission_document_indexing_instance_view,
+    ), icon_class=icon_index, text=_('Indexes'),
     view='indexing:index_list'
 )
 link_index_setup = Link(