Replace the generic exception class with a more specific one.

web/pgadmin/feature_tests/xss_checks_pgadmin_debugger_test.py

@@ -44,7 +44,7 @@ class CheckDebuggerForXssFeatureTest(BaseFeatureTest):
 
         if test_utils.does_function_exist(self.server, self.test_db,
                                           self.function_name) != 'True':
-            raise Exception("The required function is not found")
+            raise RuntimeError("The required function is not found")
 
     def runTest(self):
         self.page.wait_for_spinner_to_disappear()