Increase timeout threshold for response time in ServerTest

test/test.cc

@@ -6715,7 +6715,7 @@ TEST_F(ServerTest, SendLargeBodyAfterRequestLineError) {
     ASSERT_TRUE(res);
     EXPECT_EQ(StatusCode::OK_200, res->status);
     EXPECT_EQ("Hello World!", res->body);
-    EXPECT_LE(elapsed, 100);
+    EXPECT_LE(elapsed, 500);
   }
 }