Fill in _objects_by_name for constraints to enable multi-threaded runs (closes #3690)
Fill in _objects_by_name for constraints to enable multi-threaded runs (closes #3690)

When a constraint is added, we have to add the MOOSE object pointer into
the _objects_by_name array for thread 0 (which we correctly do). But we
also have to add an empty array for the given name for threads with TID
> 0. That way the call to getObjectsByName() is not broken for calls
with TID > 0.  It mistakenly reports 'no object of a given name', but
the object is there, just not for the given thread.

liuwenf/moose,danielru/moose,xy515258/moose,raghavaggarwal/moose,harterj/moose,jasondhales/moose,lindsayad/moose,jhbradley/moose,liuwenf/moose,milljm/moose,dschwen/moose,backmari/moose,YaqiWang/moose,backmari/moose,apc-llc/moose,raghavaggarwal/moose,jasondhales/moose,jasondhales/moose,jbair34/moose,waxmanr/moose,jhbradley/moose,cpritam/moose,joshua-cogliati-inl/moose,dschwen/moose,zzyfisherman/moose,joshua-cogliati-inl/moose,nuclear-wizard/moose,markr622/moose,jessecarterMOOSE/moose,jessecarterMOOSE/moose,danielru/moose,giopastor/moose,xy515258/moose,zzyfisherman/moose,andrsd/moose,permcody/moose,mellis13/moose,katyhuff/moose,giopastor/moose,giopastor/moose,jinmm1992/moose,capitalaslash/moose,sapitts/moose,wgapl/moose,nuclear-wizard/moose,jessecarterMOOSE/moose,backmari/moose,apc-llc/moose,jessecarterMOOSE/moose,Chuban/moose,harterj/moose,milljm/moose,cpritam/moose,jessecarterMOOSE/moose,friedmud/moose,liuwenf/moose,sapitts/moose,shanestafford/moose,raghavaggarwal/moose,yipenggao/moose,danielru/moose,bwspenc/moose,lindsayad/moose,sapitts/moose,katyhuff/moose,yipenggao/moose,cpritam/moose,roystgnr/moose,markr622/moose,SudiptaBiswas/moose,SudiptaBiswas/moose,dschwen/moose,apc-llc/moose,yipenggao/moose,SudiptaBiswas/moose,Chuban/moose,jbair34/moose,milljm/moose,kasra83/moose,andrsd/moose,jinmm1992/moose,mellis13/moose,adamLange/moose,stimpsonsg/moose,roystgnr/moose,sapitts/moose,friedmud/moose,harterj/moose,jiangwen84/moose,milljm/moose,SudiptaBiswas/moose,dschwen/moose,dschwen/moose,idaholab/moose,laagesen/moose,liuwenf/moose,roystgnr/moose,idaholab/moose,bwspenc/moose,roystgnr/moose,waxmanr/moose,wgapl/moose,liuwenf/moose,liuwenf/moose,jhbradley/moose,harterj/moose,stimpsonsg/moose,shanestafford/moose,xy515258/moose,jinmm1992/moose,mellis13/moose,joshua-cogliati-inl/moose,capitalaslash/moose,permcody/moose,jiangwen84/moose,backmari/moose,adamLange/moose,idaholab/moose,nuclear-wizard/moose,wgapl/moose,laagesen/moose,roystgnr/moose,cpritam/moose,lindsayad/moose,harterj/moose,raghavaggarwal/moose,bwspenc/moose,andrsd/moose,zzyfisherman/moose,YaqiWang/moose,wgapl/moose,cpritam/moose,zzyfisherman/moose,bwspenc/moose,laagesen/moose,roystgnr/moose,adamLange/moose,friedmud/moose,capitalaslash/moose,adamLange/moose,milljm/moose,lindsayad/moose,zzyfisherman/moose,sapitts/moose,jiangwen84/moose,jbair34/moose,Chuban/moose,roystgnr/moose,andrsd/moose,zzyfisherman/moose,katyhuff/moose,jinmm1992/moose,katyhuff/moose,kasra83/moose,lindsayad/moose,laagesen/moose,stimpsonsg/moose,kasra83/moose,jiangwen84/moose,markr622/moose,jasondhales/moose,capitalaslash/moose,waxmanr/moose,nuclear-wizard/moose,SudiptaBiswas/moose,shanestafford/moose,apc-llc/moose,Chuban/moose,shanestafford/moose,joshua-cogliati-inl/moose,danielru/moose,permcody/moose,permcody/moose,yipenggao/moose,xy515258/moose,shanestafford/moose,waxmanr/moose,bwspenc/moose,friedmud/moose,jhbradley/moose,YaqiWang/moose,idaholab/moose,jbair34/moose,idaholab/moose,markr622/moose,YaqiWang/moose,cpritam/moose,kasra83/moose,laagesen/moose,giopastor/moose,mellis13/moose,shanestafford/moose,stimpsonsg/moose,andrsd/moose