Don't fail upgrade due to integrity constraint violation.

Author: cpatrick

core/controllers/components/UtilityComponent.php

@@ -643,7 +643,15 @@ public function installModule($moduleName)
         }
 
         $moduleDao->setCurrentVersion($version);
-        $moduleModel->save($moduleDao);
+        try {
+            $moduleModel->save($moduleDao);
+        } catch(Zend_Db_Statement_Exception $e) {
+            if ($e->getCode() === 23000) {
+                $this->getLogger()->debug("Failed to install ".$moduleName." due to integrity constraint violation.");
+            } else {
+                throw $e;
+            }
+        }
 
         if ($uuid === false) {
             if (file_exists(BASE_PATH.'/modules/'.$moduleName.'/AppController.php')) {