Add sessionId to error messages

Summary: Will allow us to look into bad sessions if necessary.

Reviewed By: passy

Differential Revision: D13695386

fbshipit-source-id: 2cfc8ec28ef4cb387ef7a5a58b02aa77a367ae81

src/__tests__/server.electron.js

@@ -23,7 +23,7 @@ beforeAll(() => {
     fs.mkdirSync(flipperDir);
   }
 
-  const logger = initLogger();
+  const logger = initLogger(mockStore);
   server = new Server(logger, mockStore);
   return server.init();
 });