This fix is for phase 1 for improving mutex on CCL and FSAL PT.
Thsi fix renamed the g_fsi_name_handle_mutex to g_fsi_cache_handle_mutex,
renamed g_handle_mutex to g_file_mutex, deleted g_transid_mutex, removed g_io_mutex,
added g_dir_handle_mutex[].

Signed-off-by: huangz <huangz@us.ibm.com>