vchoi_fork

[svn-r20216] Valgrind fix for memory leak in h5tools_dump_xxx which is fixed by adding a new function;
htri_t H5Tdetect_vlen_str(hid_t tid) to h5tools. This needs to be called before any H5Aread/H5Dread and if TRUE, then call vlen_reclaim function after the corresponding h5tools_dump_xxx().

Tested: local linux and valgrind