Convert libmesh_cast_{ptr,ref} -> cast_{ptr,ref}

Refs #3737.
Merge pull request #3739 from dschwen/terminate_3735

Terminate solves cleanly based on Postprocessor values
Merge pull request #3738 from jwpeterson/libmesh_cast

Convert libmesh_cast_{ptr,ref} -> cast_{ptr,ref}
Disable test in recover mode (#3735)