Fix multithreaded qoi derivative assembly
Fix multithreaded qoi derivative assembly

After actually figuring out what this bug was, I'm not surprised it
broke adjoints_ex5 with threading; what I can't figure out is why it
didn't break adjoints examples 1-4.

friedmud/libmesh,libMesh/libmesh,aeslaughter/libmesh,aeslaughter/libmesh,dschwen/libmesh,salazardetroya/libmesh,BalticPinguin/libmesh,jiangwen84/libmesh,salazardetroya/libmesh,hrittich/libmesh,pbauman/libmesh,cahaynes/libmesh,permcody/libmesh,dschwen/libmesh,vikramvgarg/libmesh,aeslaughter/libmesh,BalticPinguin/libmesh,pbauman/libmesh,benkirk/libmesh,vikramvgarg/libmesh,libMesh/libmesh,roystgnr/libmesh,karpeev/libmesh,pbauman/libmesh,jwpeterson/libmesh,roystgnr/libmesh,capitalaslash/libmesh,hrittich/libmesh,giorgiobornia/libmesh,90jrong/libmesh,jiangwen84/libmesh,Mbewu/libmesh,pbauman/libmesh,cahaynes/libmesh,dschwen/libmesh,hrittich/libmesh,salazardetroya/libmesh,capitalaslash/libmesh,markcmiller86/libmesh_silo,svallaghe/libmesh,dschwen/libmesh,capitalaslash/libmesh,karpeev/libmesh,giorgiobornia/libmesh,svallaghe/libmesh,permcody/libmesh,cahaynes/libmesh,balborian/libmesh,roystgnr/libmesh,jiangwen84/libmesh,dmcdougall/libmesh,jiangwen84/libmesh,dknez/libmesh,permcody/libmesh,friedmud/libmesh,benkirk/libmesh,hrittich/libmesh,dknez/libmesh,friedmud/libmesh,pbauman/libmesh,jiangwen84/libmesh,90jrong/libmesh,karpeev/libmesh,markcmiller86/libmesh_silo,libMesh/libmesh,dmcdougall/libmesh,friedmud/libmesh,jiangwen84/libmesh,giorgiobornia/libmesh,dmcdougall/libmesh,markcmiller86/libmesh_silo,dschwen/libmesh,capitalaslash/libmesh,Mbewu/libmesh,giorgiobornia/libmesh,balborian/libmesh,friedmud/libmesh,coreymbryant/libmesh,karpeev/libmesh,dschwen/libmesh,cahaynes/libmesh,aeslaughter/libmesh,dmcdougall/libmesh,jwpeterson/libmesh,balborian/libmesh,benkirk/libmesh,benkirk/libmesh,dmcdougall/libmesh,90jrong/libmesh,balborian/libmesh,markcmiller86/libmesh_silo,markcmiller86/libmesh_silo,Mbewu/libmesh,vikramvgarg/libmesh,BalticPinguin/libmesh,jwpeterson/libmesh,cahaynes/libmesh,jwpeterson/libmesh,permcody/libmesh,pbauman/libmesh,salazardetroya/libmesh,balborian/libmesh,svallaghe/libmesh,balborian/libmesh,libMesh/libmesh,svallaghe/libmesh,giorgiobornia/libmesh,dknez/libmesh,jwpeterson/libmesh,jwpeterson/libmesh,friedmud/libmesh,vikramvgarg/libmesh,hrittich/libmesh,Mbewu/libmesh,pbauman/libmesh,coreymbryant/libmesh,hrittich/libmesh,Mbewu/libmesh,libMesh/libmesh,karpeev/libmesh,benkirk/libmesh,roystgnr/libmesh,markcmiller86/libmesh_silo,cahaynes/libmesh,pbauman/libmesh,giorgiobornia/libmesh,svallaghe/libmesh,dmcdougall/libmesh,benkirk/libmesh,vikramvgarg/libmesh,svallaghe/libmesh,roystgnr/libmesh,salazardetroya/libmesh,dmcdougall/libmesh,coreymbryant/libmesh,90jrong/libmesh,jwpeterson/libmesh,dknez/libmesh,BalticPinguin/libmesh,cahaynes/libmesh,svallaghe/libmesh,permcody/libmesh,roystgnr/libmesh,friedmud/libmesh,permcody/libmesh,salazardetroya/libmesh,Mbewu/libmesh,giorgiobornia/libmesh,90jrong/libmesh,permcody/libmesh,BalticPinguin/libmesh,aeslaughter/libmesh,libMesh/libmesh,90jrong/libmesh,jwpeterson/libmesh,Mbewu/libmesh,giorgiobornia/libmesh,hrittich/libmesh,vikramvgarg/libmesh,capitalaslash/libmesh,giorgiobornia/libmesh,Mbewu/libmesh,dschwen/libmesh,vikramvgarg/libmesh,90jrong/libmesh,karpeev/libmesh,aeslaughter/libmesh,hrittich/libmesh,salazardetroya/libmesh,roystgnr/libmesh,vikramvgarg/libmesh,balborian/libmesh,dschwen/libmesh,friedmud/libmesh,90jrong/libmesh,libMesh/libmesh,capitalaslash/libmesh,BalticPinguin/libmesh,coreymbryant/libmesh,markcmiller86/libmesh_silo,friedmud/libmesh,jiangwen84/libmesh,coreymbryant/libmesh,Mbewu/libmesh,dmcdougall/libmesh,jiangwen84/libmesh,vikramvgarg/libmesh,libMesh/libmesh,BalticPinguin/libmesh,benkirk/libmesh,aeslaughter/libmesh,markcmiller86/libmesh_silo,benkirk/libmesh,cahaynes/libmesh,karpeev/libmesh,aeslaughter/libmesh,dknez/libmesh,dknez/libmesh,karpeev/libmesh,coreymbryant/libmesh,coreymbryant/libmesh,90jrong/libmesh,balborian/libmesh,balborian/libmesh,pbauman/libmesh,capitalaslash/libmesh,roystgnr/libmesh,coreymbryant/libmesh,benkirk/libmesh,svallaghe/libmesh,svallaghe/libmesh,hrittich/libmesh,BalticPinguin/libmesh,balborian/libmesh,salazardetroya/libmesh,dknez/libmesh,permcody/libmesh,dknez/libmesh,aeslaughter/libmesh,capitalaslash/libmesh