Fix authRequired function

If an error occurs because of missing authentication, it means that authentication is required.

Author: stevenpost

templates/mongoshrc.js.erb

@@ -19,9 +19,13 @@ function rsReconfigSettings(settings){
 <% if @auth and @store_creds -%>
 function authRequired() {
   try {
-    return db.serverCmdLineOpts().code == 13;
+    return db.serverCmdLineOpts().ok != 1;
   } catch (err) {
-    return false;
+    if (err.message.match(/requires authentication/) || err.message.match(/not authorized on admin/)) {
+      return true
+    } else {
+      throw("Unknown error :" + err)
+    }
   }
 }