Load the jobacct_gather plugin in the slurmd to make sure it is

possible.  Otherwise if it fails it wouldn't happen to the slurmstepd
and might be missed by failing silently.

It will also mess up the packing/unpacking since it should be obvious if
it fails on the slurmctld.

src/slurmd/slurmd/slurmd.c

@@ -296,6 +296,14 @@ main (int argc, char *argv[])
 		fatal("Unable to clear interconnect state.");
 	switch_g_slurmd_init();
 
+	/* Make sure we can load the jobacct_gather plugin so if there
+	   is a problem we don't have to wait for the slurm_stepd to
+	   figure it out.
+	*/
+	if (slurm_jobacct_gather_init() != SLURM_SUCCESS)
+		fatal("Unable to initialize jobacct_gather plugin.  "
+		      "This is manditory for pack/unpack jobs.");
+	slurm_jobacct_gather_fini();
 	_create_msg_socket();
 
 	conf->pid = getpid();