modifications for scontrol and the api to work cross-cluster

src/api/allocate.c

src/api/block_info.c

src/api/config_info.c

src/api/init_msg.c

src/api/job_info.c

src/api/node_info.c

src/api/partition_info.c

src/common/slurm_protocol_defs.h

src/scontrol/info_job.c

src/scontrol/scontrol.c

src/scontrol/scontrol.h

src/scontrol/update_job.c