MAGETWO-33813: Replace Magento\Framework\Model\Exception to LocalizedException

Author: Dooffy

app/code/Magento/Tax/Model/TaxClass/Repository.php

@@ -103,7 +103,7 @@ public function save(\Magento\Tax\Api\Data\TaxClassInterface $taxClass)
         try {
             $this->taxClassResource->save($taxClass);
         } catch (ModelException $e) {
-            if (strpos($e->getMessage(), __('Class name and class type')) !== false) {
+            if (strpos($e->getMessage(), (string)__('Class name and class type')) !== false) {
                 throw new InputException(
                     'A class with the same name already exists for ClassType %classType.',
                     ['classType' => $taxClass->getClassType()]