Changed to explicitly set default group to node.
Changed to explicitly set default group to node.

amandersillinois/landlab,csherwood-usgs/landlab,ManuSchmi88/landlab,cmshobe/landlab,RondaStrauch/landlab,RondaStrauch/landlab,Carralex/landlab,RondaStrauch/landlab,laijingtao/landlab,cmshobe/landlab,laijingtao/landlab,amandersillinois/landlab,landlab/landlab,ManuSchmi88/landlab,Carralex/landlab,landlab/landlab,csherwood-usgs/landlab,ManuSchmi88/landlab,cmshobe/landlab,Carralex/landlab,landlab/landlab