replicate: clear pre_op_done/piggyback values after open fd self-heal
replicate: clear pre_op_done/piggyback values after open fd self-heal

Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
Signed-off-by: Vijay Bellur <vijay@dev.gluster.com>

BUG: 1235 (Bug for all pump/migrate commits)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=1235

Kaushikbv/Gluster,Kaushikbv/Gluster,Kaushikbv/Gluster