Add school-specific IT email address to configuration for display on errors

[thecoolestguy]

For non-UCSF schools that are using the Ilios LTI, when users experience an authentication problem, Ilios displays an error telling them to reach out to us at [email protected] and when they do so, we, in-turn, reach out to their respective school's IT people to request that they deal with it.

It has been decided that we need a configurable item in the LTI that requires schools to enter their own respective IT dept email address during setup so, when an authentication error occurs, their users are instructed to contact their own IT department at the appropriate address.

[dartajax]

This configurable email contact information for issues has been requested again - putting this in ready.