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It really only stops Create from being called if the value is true

We don't handle nested groups, and if LDAP is flat and only lists
users in the parent group, we'll try and fail to remove the recursively
found users from the RT group, rather than removing the nested group.

Also improve the debugging about what work is happening

We probably want this to be configurable not to import groups

don't start an RT server, and test that show correctly fails to import

We're going to the DB and not driving the UI
kills warnings about setting Config after starting the server
and lets us keep config changing in sensible parts of the test

Rather than just returning all the data in @data