trace: Do not clobber own itable
trace: Do not clobber own itable

.. as it could've been assigned by our parent such as server or nfs.

Signed-off-by: Shehjar Tikoo <shehjart@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 473 (Trace misreporting pre/post attributes for setattr.)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=473

Kaushikbv/Gluster,Kaushikbv/Gluster,Kaushikbv/Gluster