Extends EDGE types supported by get_element_topology.
Extends EDGE types supported by get_element_topology.

closes #8599

permcody/moose,bwspenc/moose,stimpsonsg/moose,SudiptaBiswas/moose,jessecarterMOOSE/moose,stimpsonsg/moose,laagesen/moose,jessecarterMOOSE/moose,milljm/moose,YaqiWang/moose,backmari/moose,Chuban/moose,idaholab/moose,jessecarterMOOSE/moose,backmari/moose,milljm/moose,bwspenc/moose,bwspenc/moose,YaqiWang/moose,idaholab/moose,Chuban/moose,YaqiWang/moose,nuclear-wizard/moose,dschwen/moose,andrsd/moose,friedmud/moose,liuwenf/moose,permcody/moose,bwspenc/moose,milljm/moose,sapitts/moose,stimpsonsg/moose,sapitts/moose,laagesen/moose,nuclear-wizard/moose,Chuban/moose,friedmud/moose,dschwen/moose,permcody/moose,jessecarterMOOSE/moose,idaholab/moose,laagesen/moose,jessecarterMOOSE/moose,bwspenc/moose,lindsayad/moose,andrsd/moose,backmari/moose,yipenggao/moose,lindsayad/moose,sapitts/moose,friedmud/moose,sapitts/moose,liuwenf/moose,sapitts/moose,harterj/moose,nuclear-wizard/moose,andrsd/moose,backmari/moose,liuwenf/moose,idaholab/moose,nuclear-wizard/moose,harterj/moose,SudiptaBiswas/moose,yipenggao/moose,harterj/moose,dschwen/moose,YaqiWang/moose,dschwen/moose,lindsayad/moose,liuwenf/moose,milljm/moose,laagesen/moose,andrsd/moose,SudiptaBiswas/moose,yipenggao/moose,lindsayad/moose,SudiptaBiswas/moose,yipenggao/moose,dschwen/moose,liuwenf/moose,friedmud/moose,harterj/moose,stimpsonsg/moose,milljm/moose,harterj/moose,SudiptaBiswas/moose,laagesen/moose,liuwenf/moose,Chuban/moose,idaholab/moose,permcody/moose,andrsd/moose,lindsayad/moose