title: Dropping view in bigquery fails thru UI and api
body: <p>Dropping any existing views on sandbox_views dataset of bq project test-altar-543 fails with "Not Found: Dataset test-altar-543:sandbox" errpr. Currently there are 7 views and they are referencing the tables in sandbox dataset. All fail to drop!</p>
  
  <p>Any new view creation with the same content succeeds and also dropping it later works too.</p>
  
  <p><a href="https://code.google.com/p/google-bigquery/issues/detail?id=207&amp;thanks=207&amp;ts=1420492761" rel="nofollow">https://code.google.com/p/google-bigquery/issues/detail?id=207&amp;thanks=207&amp;ts=1420492761</a></p>