Revert system test changes:

* Revert "Shutdown rippled before http server in json rpc test to avoid http server potentially receiving messages due to automatic ledger close interval."
* Revert "Update ripple-lib integration tests"

This reverts commit 83442825e5.

test/jsonrpc-test.js

@@ -50,10 +50,10 @@ function build_teardown() {
   return function (done) {
     var self  = this;
 
-    teardown.call(self, function () {
-      self.server.close(function () {
-        done();
-      });
+    self.server.close(function () {
+      // console.log("server closed");
+
+      teardown.call(self, done);
     });
   };
 };