Comment #3 on issue 745 by tudor.gi...(a)gmail.com: There is no need by
default to specify the importerClass when invoking the
MooseCompositeImportTask subclasses
http://code.google.com/p/moose-technology/issues/detail?id=745
No. But, as I understood, the issue was that it was not possible to have it
without specifying importerClass:.