[IBAL] 1) fixed a bug in RTU handling, which caused immediate unbinding QP from CEP...

[IBAL] 1) fixed a bug in RTU handling, which caused immediate unbinding QP from CEP and eventual crash on arriving DREQ after QP destroying;
2) fixed a bug with not-releasing of a parameter  structure, allocated for REQ handling, in several paths of error flow;
3) fixed incorrect ioctl return code;
4) reworked usage of reference counting to make the code more readable;
5) added AL_RESERVED_CID. It is set to enforce CEP destroy before destroying the bound QP;
6) fixed some CL_ASSERTs to adopt setting a new AL_RESERVED_CID value upon QP destroy;
7) added more debug prints;

git-svn-id: svn://openib.tc.cornell.edu/gen1@908 ad392aa1-c5ef-ae45-8dd8-e69d62a5ef86