Added Front end cache to fsi_get_name_from_handle() path.
- Every time and open or close comes in, we insert or delete an
  cache entry from this front end cache
- Every time we do a name_from_handle lookup, we hit the front
  end cache first before hitting the regular 2500-entry cache
- Insertion will be a binary insertion to look for a proper
  insertion point that will keep the table in proper order
- Lookup and deletion will be performed using a binary search
  to locate proper entry

Signed-off-by: Matthew Cleveland <mgclevel@us.ibm.com>
Logging changes for commit ID
6ae161e9a98d480acae1a512461ec0d10bd4e3c7
Signed-off-by: Hin C Lam <hincheuk@us.ibm.com>