Attempted test fix

This revert test has started failing frequently. It's possible the reason is performance
Improvements, resulting ineffectively no change in time between the entries.

I's also possible the issue is with the timestamp being used but I think that has
a permitted variance

Change-Id: Ieb8b50fd4dce22277ea760a490a9134bd15af5e1

tests/phpunit/api/v3/LoggingTest.php

@@ -273,6 +273,7 @@ protected function createLegacyStyleContactLogTable() {
   public function testRevert() {
     $contactId = $this->individualCreate();
     $this->callAPISuccess('Setting', 'create', array('logging' => TRUE));
+    sleep(1);
     CRM_Core_DAO::executeQuery("SET @uniqueID = 'woot'");
     $timeStamp = date('Y-m-d H:i:s');
     $this->callAPISuccess('Contact', 'create', array(