CRM-16701 - cant_update fields for SavedSearch.
Most of the fields of a SavedSearch are calculated based on form_values,
so I excluded them from the testCreateSingleValueAlter test in
SyntaxConformanceTest.
I guess that if there are still failing tests left, they are caused
by CRM-16736.
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* CRM-16701: Create API for saved searches
https://issues.civicrm.org/jira/browse/CRM-16701
* CRM-16736: Possible NULL/'null' error in SavedSearch BAO
https://issues.civicrm.org/jira/browse/CRM-16736