Register objects in individual source files instead of RELAP7App.C
Register objects in individual source files instead of RELAP7App.C

Note: Only do this with the "standard" types of objects (Kernels,
BoundaryConditions, Components, etc.). There are some RELAP-7 objects
that use special registration macros that were not updated.

Refs idaholab/moose#11023.

harterj/moose,bwspenc/moose,sapitts/moose,idaholab/moose,bwspenc/moose,bwspenc/moose,lindsayad/moose,milljm/moose,sapitts/moose,jessecarterMOOSE/moose,harterj/moose,milljm/moose,lindsayad/moose,bwspenc/moose,jessecarterMOOSE/moose,sapitts/moose,idaholab/moose,sapitts/moose,andrsd/moose,andrsd/moose,dschwen/moose,laagesen/moose,laagesen/moose,jessecarterMOOSE/moose,milljm/moose,lindsayad/moose,milljm/moose,andrsd/moose,sapitts/moose,andrsd/moose,harterj/moose,laagesen/moose,dschwen/moose,milljm/moose,laagesen/moose,dschwen/moose,dschwen/moose,harterj/moose,idaholab/moose,dschwen/moose,jessecarterMOOSE/moose,harterj/moose,lindsayad/moose,andrsd/moose,idaholab/moose,laagesen/moose,jessecarterMOOSE/moose,lindsayad/moose,idaholab/moose,bwspenc/moose