Fix ElimComponentDefInst for nested def/inst
The cif validator crashes due to a bug in the eliminate component def/inst transformation for the following cif specification:
group def D(): group e: group def F(): v : V(); end end end group def V(): end d : D();
The problem is in the method
findCompDefs, it incorrectly concludes that definition
D() does not contain definitions or instantiations. That method cannot find definitions or instantiations contained within a group.