Resolves a number of test failures verified locally

TODO: Verify on EL6-4 OSX-8, OSX-9, and WS08-R2 test rigs

1. DVPL-3260: Make Job.isReady use the dispatchState field on HTTP status 200 to determine if it is indeed ready2. test_disable_enable (test_index.IndexTest)3. test_setpriority (test_job.TestJobWithDelayedDone)4. test_enable_preview (test_job.TestJobWithDelayedDone)5. test_index (test_examples.ExamplesTestCase)6. test_list_with_sort_mode_auto (test_collection.CollectionTestCase+)7. test_search (test_examples.ExamplesTestCase)8. test_suppress (test_saved_search.TestSavedSearch)9. test_update (test_app.TestApp)