[BUG] XXE levels don't create solution file when opened

[ismisepaul]

Describe the bug
When you open the XXE levels from Admin -> Module Management -> Open and Close Modules the level solution file is not created.

To Reproduce
Steps to reproduce the behavior:

1. Log in with admin
2. Admin -> Module Management -> Open and Close Modules
3. Open an XXE level
4. Check file system - the solution file with the key is not created

This also is observed in by Category.

Expected behavior
The solution files are created on the filesystem when its opened from this.

[ismisepaul]

As a work around (when you only have access to the app and not the filesystem) when you have a set number of levels open and you want to create the file

• Go Admin -> Module Management -> Open and Close Modules
• Select all the "To Close", copy them and store them somewhere (if something goes wrong and you need a record of what you had open)
• Unselect the "To Close"
• Select all "To Open" (these are the ones you'll want to close)
• Use an HTTP Proxy, you don't want to send this request through so have intercept on!
• With intercept on in the proxy click "update module status"
• Send the request to the repeater and edit it so that the "toClose" are now "toOpen"
• Drop the request in the proxy
• Refresh the page and click the checkbox "Enable Unsafe Levels" and Open Web App Levels Only
• Go to the repeater and send the request (make sure you've modified all "toOpen" to "toClose"
• You'll now have all the levels you had open at the beginning of this but also the files for XXE will be created