Add completion for attributes in node*attrib
Add completion for attributes in node*attrib

Make some of the tedium of the long attribute names bearable
through tab completion.

jjohnson42/confluent,jjohnson42/confluent,xcat2/confluent,xcat2/confluent,xcat2/confluent,xcat2/confluent,jjohnson42/confluent,jjohnson42/confluent,jjohnson42/confluent,xcat2/confluent