return ENOENT instead of ESTALE for links in client for stripe
return ENOENT instead of ESTALE for links in client for stripe

Instead of returning a ESTALE for links and symlink return
 a ENOENT, as they only exist on the FIRSTCHILD, and any
lookup fails in the other bricks.

Signed-off-by: shishir gowda <shishirng@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 1152 (ln on symlink returns NFS STALE error even on success)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=1152

Kaushikbv/Gluster,Kaushikbv/Gluster,Kaushikbv/Gluster