Fix variable templating that ignores EMAIL_SUPPORT
Fix variable templating that ignores EMAIL_SUPPORT

I think this is part of a larger problem. In settings:
`__init__.py` defines `ATMO_SUPPORT` to be its version of
`ADMINS_EMAIL_TUPLE`.  Then the `local.py` defines a new `ADMINS_EMAIL_TUPLE`.
But `ATMO_SUPPORT` doesn't get redefined. I noticed a few other variables with
this error.

CCI-MOC/GUI-Backend,CCI-MOC/GUI-Backend,CCI-MOC/GUI-Backend,CCI-MOC/GUI-Backend