Some of the "use RT::Foo" modules listed in RT::Record are themselves
subclasses of RT::Record.  This means that RT::Record's methods are not
necessarily initialized before the subclasses are loaded.  In tern, this
causes the methods of RT::Record itself to be invisible to Role::Basic's
"with" -- though methods of its superclass (DBIx::SearchBuilder::Record)
are, as hey are pulled in earlier by the compile-time "use base" above.

Move the import of RT::Foo classes to runtime, not compile-time.  This
simplifies load order during compile-time, ensuring that a class loads
all of its parent classes and roles without possibly creating load-order
loops.  This also requires that any roles also declare their module
dependencies using "require" as well.  As there are no notable "import"
methods to RT's object classes, and (save for Role::Basic method
resolution) compile-time checking is necessary, this is safe.