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

tests/phpunit/api/v3/LoggingTest.php

@@ -273,6 +273,9 @@ protected function createLegacyStyleContactLogTable() {
   public function testRevert() {
     $contactId = $this->individualCreate();
     $this->callAPISuccess('Setting', 'create', array('logging' => TRUE));
+    // Pause for one second here to ensure the timestamps between the first create action
+    // and the second differ.
+    sleep(1);
     CRM_Core_DAO::executeQuery("SET @uniqueID = 'woot'");
     $timeStamp = date('Y-m-d H:i:s');
     $this->callAPISuccess('Contact', 'create', array(