MB-12928: DCP deletion - Packet's body may contain extMeta
MB-12928: DCP deletion - Packet's body may contain extMeta

With goXDCR, adjustedTime and lwwConflictFlag will be sent
along with the DCP mutation/deletion packets, this means that
the bodylen for the deletion packet will no longer be zero.

Change-Id: Ie6a5d1d434355566910277ab3872d22b31777440
Reviewed-on: http://review.couchbase.org/45709
Reviewed-by: abhinav dangeti <d73ef2279de6577f7bf081737ee47554bbb7dc82@couchbase.com>
Tested-by: abhinav dangeti <d73ef2279de6577f7bf081737ee47554bbb7dc82@couchbase.com>

daverigby/kv_engine,cloudrain21/memcached-1,cloudrain21/memcached-1,daverigby/memcached,daverigby/kv_engine,couchbase/memcached,daverigby/kv_engine,mrkwse/memcached,owendCB/memcached,couchbase/memcached,daverigby/memcached,daverigby/memcached,mrkwse/memcached,couchbase/memcached,owendCB/memcached,owendCB/memcached,mrkwse/memcached,cloudrain21/memcached-1,mrkwse/memcached,daverigby/kv_engine,daverigby/memcached,owendCB/memcached,couchbase/memcached,cloudrain21/memcached-1