Updates from version 15.12
- Backport fixes:
- librdmacm: Don't overwrite errno returned from libibverbs
- srp_daemon: Fix systemd dependency
- bnxt_re: Fix reported error code from create_cq
- verbs: Replace SQ with RQ in max_recv_sge's documents
- cxgb4: Fix reported error code from create_cq
- libqedr: Fix reported error code from create_cq
- udaddy: Fix create_reply_ah error flow
- redhat: no need to recursively remove srp_daemon.sh
- mlx5: Fix wqe size parameter in wqe signature calculation