unit test fix

Author: Nazar65

lib/internal/Magento/Framework/Event/Test/Unit/Invoker/InvokerDefaultTest.php

@@ -173,7 +173,7 @@ public function testWrongInterfaceCallWithDisabledDeveloperMode($shared)
             $this->returnValue($notObserver)
         );
         $this->_appStateMock->expects(
-            $this->exactly(2)
+            $this->exactly(1)
         )->method(
             'getMode'
         )->will(