Issue: Ganesha dumps core during a pynfs test (RD2) when started in DEBUG log level.

Fix:
The sequence id is written into a string str, whose size was 31 bytes.The
values of stateid->seqid vary from 1,2 to the largest number possible,
4294967295. The size of the string str has to be 36 bytes long (along with the ':')
to accommodate the largest possible stateid->seqid.
Increasing the string size to fix the issue.