Added comment for Component::init()
Added comment for Component::init()

Refs idaholab/relap-7#19688
idaholab/moose,andrsd/moose,bwspenc/moose,sapitts/moose,sapitts/moose,idaholab/moose,andrsd/moose,bwspenc/moose,idaholab/moose,jessecarterMOOSE/moose,milljm/moose,milljm/moose,andrsd/moose,andrsd/moose,bwspenc/moose,lindsayad/moose,dschwen/moose,milljm/moose,laagesen/moose,jessecarterMOOSE/moose,harterj/moose,lindsayad/moose,dschwen/moose,andrsd/moose,harterj/moose,milljm/moose,laagesen/moose,idaholab/moose,idaholab/moose,dschwen/moose,laagesen/moose,harterj/moose,laagesen/moose,jessecarterMOOSE/moose,sapitts/moose,dschwen/moose,sapitts/moose,lindsayad/moose,dschwen/moose,harterj/moose,harterj/moose,jessecarterMOOSE/moose,bwspenc/moose,lindsayad/moose,jessecarterMOOSE/moose,milljm/moose,laagesen/moose,lindsayad/moose,sapitts/moose,bwspenc/moose