Fix Coverity issues in OFED

[vangyzen]

Summary

• read_ibdiag_config NULL deref
• read_ibdiag_config mem leak
• ib_mad_inv_field_str Missing comma in a string array initialization
• print_node_header NULL deref
• diff_node_ports copy-paste error
• ibportstate.c main() missing break in switch
• set_thresholds NULL ptr deref
• dump_unicast_tables leaks mapnd
• umad_cm_attr_str dead code
• __ibv_close_device close(-1)
• check return value of listen()
• mlx5 bitmap.h - bad bit shift - UB
• get_dst_addr check return value of inet_pton
• osm_perfmgr_init check return value of cl_spinlock_init
• osm_port_new memory leak on error path
• sa_mad_ctrl_rcv_callback missing break in switch case

I did not include CID numbers because these were found by an internal run at Isilon.

[kib]

contrib/ofed/libibverbs/examples/rc_pingpong.c

276

== -1 or, in style with other places around, < 0.

There and below.