If a job's time limit is unset, report its value as "Partition_Limit".

A job time limit of NO_VAL is valid while the job is queued, set its
value to the partition's limit only when the job is allocated resources.
Srun reports when a queued job is finally allocated resources.

src/srun/allocate.c

@@ -162,6 +162,7 @@ _wait_for_resources(resource_allocation_response_msg_t **resp)
 		}
 
 	}
+	info ("job %u has been allocated resources", r->job_id);
 
 	xsignal(SIGINT, SIG_IGN);
 }