Improved log error for plugin persist

cloudcontrol/node/host/__init__.py

@@ -268,7 +268,8 @@ class Handler(BasePlugin):
             with open(self.main.config.plugins_store_path, 'w') as f:
                 pickle.dump([p for p in self.plugins], f)
         except EnvironmentError as exc:
-            logger.error('Cannot save loaded plugins: %s (%s)',
+            logger.error('Cannot save loaded plugins in \'%s\': %s (%s)',
+                         self.main.config.plugins_store_path,
                          exc.errno, exc.strerror)
         else:
             logger.debug('Plugins state saved')