Fixes #53. The msg queue group shared segment information marshals the queue information in network order pertaining to the queue group. But it uses htonl and ntohl to marshall and unmarshall the queue group data back though the ClNameT queueLength field is 16 bits or 2 bytes. This could potentially result in shared segment inconsistencies or mess ups depending on the padding of the clnamet within the queue group data struct and we might end up with incorrect queue lengths marshalled and unmarshalled back from shared segment. Side effects would be core-dumps in msg server while trying to interpret the queue group shm info or while trying to access the queue group shared segment info.
Fixes #54. Free cached ckpt section iteration information pertaining to fetched ckpt section ids. Also free the section iteration info. for each fetched section ids on section iteration initialize