Really is better if we output a message indicating that the job was aborted due to hitting the execution time limit

Refs #3960
Oops!  r29830 added a variable into OPAL_VAR_SCOPE that is actually
needed in the global scope ($ompi_check_fca_dir).  This commit removes
it from the OPAL_VAR_SCOPE, so it should be fixed now.

Sorry about that, folks!  :-(