i18n /api/apps/languages not always returning all results

Description:

This is incredibly hard to reproduce... I did it one time and accidentally overwrote my clipboard with the screenshot of it happening!

Essentially, typing / shows a list of available slash commands. While in the ?layout=embedded view, I typed / and saw a broken list of slash commands. It shows things like app description, then a GUID instead of examples of what to type. I've spent the last 20 minutes trying to reproduce it, but I have not been able to.

Steps to reproduce:

1. Open a direct message in /direct/username?layout=embedded
2. Type /

Expected behavior:

Actual behavior:

In rare cases it doesn't actually show the slash command information, instead, it shows GUIDs for the apps. I wasn't able to get a screenshot -- I will update this issue if it happens again.

Server Setup Information:

• Version of Rocket.Chat Server: 0.70.4 dbff6ee20ff756d5654bc36da66de4999ff7cd9c
• Operating System: Centos 7
• Deployment Method: tar zxvf , npm install, service start.
• Number of Running Instances: 1
• NodeJS Version: v8.9.3

Start at the /api/apps/languages entry point and trace how its results populate slash commands in the embedded direct-message view. Exercise the /direct/username?layout=embedded flow while typing /, then verify that every app shows its command information rather than a GUID and add coverage for the intermittent response if the relevant test location is found.