Enabling the ability of the External Tool capability to pull custom parameters from the scope of "User".

In some LTI services it is required to send information that currently cannot be sent dynamically as a custom parameter, this change is to solve this problem.

Currently, you have access to all the user information found in the mdl_user table, but with this modification you can access the user's profile fields.

If you add a new profile field, you can't use inside the External Tools (LTI)  as a parameter of the custom parameters.