CAS_PGTStorage_Db: call method with incorrect case: createTableSQL (apereo#432)

Author: voku

source/CAS/PGTStorage/Db.php

@@ -316,7 +316,7 @@ public function createTable()
         try {
             $pdo->beginTransaction();
 
-            $query = $pdo->query($this->createTableSQL());
+            $query = $pdo->query($this->createTableSql());
             $query->closeCursor();
 
             $pdo->commit();