Working on issue #368 - Fixes for issues arised while using the import via the frontend.

lib/import/otrs.rb

@@ -49,11 +49,15 @@ module Import
       true
     end
 
+    def connection_test
+      Import::OTRS::Requester.connection_test
+    end
+
     private
 
     def checks
       check_import_mode
-      Import::OTRS::Requester.connection_test
+      connection_test
     end
 
     def prerequisites
@@ -63,9 +67,9 @@ module Import
       Store::Object.create_if_not_exists(name: 'Ticket::Article')
     end
 
-    def import(remote_object)
+    def import(remote_object, args = {})
       log "loading #{remote_object}..."
-      import_action(remote_object)
+      import_action(remote_object, args)
     end
 
     def threaded_import(remote_object, args = {})

lib/import/otrs/diff.rb

@@ -29,7 +29,7 @@ module Import
       end
 
       def ticket_diff
-        import_regular('Ticket', diff: true)
+        import('Ticket', diff: true)
       end
     end
   end

lib/import/otrs/import_stats.rb

@@ -38,7 +38,7 @@ module Import
       end
 
       def base_done
-        Group.count + ::Ticket::State.count + ::Ticket::Priority.count
+        ::Group.count + ::Ticket::State.count + ::Ticket::Priority.count
       end
 
       def base_total
@@ -46,7 +46,7 @@ module Import
       end
 
       def user_done
-        User.count
+        ::User.count
       end
 
       def user_total
@@ -54,7 +54,7 @@ module Import
       end
 
       def ticket_done
-        Ticket.count
+        ::Ticket.count
       end
 
       def ticket_total