allow import/export without kaltura configured

closes #4357

Change-Id: If1f7df936fbd012fcd26c0509b3b3f37188ca6f6
Reviewed-on: https://gerrit.instructure.com/3242
Reviewed-by: Brian Palmer <brianp@instructure.com>
Tested-by: Hudson <hudson@instructure.com>

app/models/media_object.rb

@@ -49,6 +49,7 @@ class MediaObject < ActiveRecord::Base
   # upload to complete. Wrap it in a timeout if you ever want it to give up
   # waiting.
   def self.add_media_files(attachments, wait_for_completion)
+    return unless Kaltura::ClientV3.config
     attachments = Array(attachments)
     client = Kaltura::ClientV3.new
     client.startSession(Kaltura::SessionType::ADMIN)

lib/cc/web_resources.rb

@@ -35,6 +35,7 @@ module CC
     end
 
     def add_media_objects
+      return unless Kaltura::ClientV3.config
       client = Kaltura::ClientV3.new
       client.startSession(Kaltura::SessionType::ADMIN)