Manual job resume bookkeeping fix

If a suspended job is manually resumed and gang scheduling is
configured, but no time slices are available for the job being
resumed, then just resume it without adding it to a time slice.
The jobs previously running on those nodes will be replaced with
new jobs as resources become available and the resumed job will
basically be treated like a stray job.
bug 2031

src/plugins/select/cons_res/select_cons_res.c

@@ -875,11 +875,10 @@ static int _add_job_to_res(struct job_record *job_ptr, int action)
 			/* Job started or resumed and it's allocated resources
 			 * are already in use by some other job. Typically due
 			 * to manually resuming a job. */
-			error("cons_res: ERROR: job overflow: "
+			error("cons_res: job overflow: "
 			      "could not find idle resources for job %u",
 			      job_ptr->job_id);
-			/* just add the job to the last row for now */
-			_add_job_to_row(job, &(p_ptr->row[p_ptr->num_rows-1]));
+			/* No row available to record this job */
 		}
 		/* update the node state */
 		for (i = 0, n = -1; i < select_node_cnt; i++) {