[TIMOB-12247] KitchenSink : Seeing light grey background background instead of the white in various kitchensink test cases.

Steps to reproduce: 1.Build kitchensink with 2.1.3 GA. 2.The issue can be seen in the following test cases: *Base_UI -> views -> table view -> table section header *Base_UI -> views -> table view -> table grouped view *Base_UI -> views -> table view -> table view options *Base_UI -> views -> table view -> update row object *Base_UI -> views -> table view -> table with controls 2 *Base_UI -> views -> table view -> table with controls *Base_UI -> views -> table view -> table view(layout 5) *Base_UI -> views -> table view -> refresh table view 3.Build another kitchensink with sdk 3.0.1.v20121228113204 on another similar device running the same iOS version. 4.Go to test cases mentioned above in kitchensink. Expected results: 1.The background should be white in color. Actual result: 1.The background is light grey. Attached are some screen shots for reference.