Revert "CBQE-2340: added support to ignore expected memcached errors during load data"

This reverts commit 33aca09e0b716ae7a88b00caa52349913d853ef9.

Change-Id: Ica9bd695c841a2e04d226cf11dadda55361bfff1
Reviewed-on: http://review.couchbase.org/40494
Reviewed-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
Tested-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>